In the excerpt above, this is how Anna describes the prairie: 'Outside, the prairie reached out and touched the places where the sky came down.' What does this say about the prairie

Questions below are about the following excerpt from Sarah, Plain and Tall by Patricia MacLachlan:     'Did Mama sing every day?' asked Caleb. 'Every-single-day?' He sat close to the fire, his chin in his hand. It was dusk, and the dogs lay beside him on the warm hearthstones.     'Every-single-day,' I told him for the second time this week. For the twentieth time this month. The hundredth time this year? And the past few years?     'And did Papa sing, too?'     'Yes. Papa sang, too. Don’t get so close, Caleb. You’ll heat up.'     He pushed his chair back. It made a hollow scraping sound... Show more

Questions below are about the following excerpt from Sarah, Plain and Tall by Patricia MacLachlan:    

'Did Mama sing every day?' asked Caleb. 'Every-single-day?' He sat close to the fire, his chin in his hand. It was dusk, and the dogs lay beside him on the warm hearthstones.    
'Every-single-day,' I told him for the second time this week. For the twentieth time this month. The hundredth time this year? And the past few years?    
'And did Papa sing, too?'    
'Yes. Papa sang, too. Don’t get so close, Caleb. You’ll heat up.'    
He pushed his chair back. It made a hollow scraping sound on the hearthstones. And the dogs stirred. Lottie, small and black, wagged her tail and lifted her head. Nick slept on.    
I turned the bread dough over and over on the marble slab on the kitchen table.    
'Well, Papa doesn’t sing anymore,' said Caleb very softly. A log broke apart and crackled in the fireplace. He looked up at me. 'What did I look like when I was born?'    
'You didn’t have any clothes on,' I told him.    
'I know that,' he said.    
'You looked like this.' I held the bread dough up in a round pale ball.    
'I had hair,' said Caleb seriously.    
'Not enough to talk about,' I said.    
'And she named me Caleb,' he went on, filling in the old familiar story.    
'I would have named you Troublesome,' I said, making Caleb smile.    
'And Mama handed me to you in the yellow blanket and said…' He waited for me to finish the story. 'And said…?'    
I sighed. 'And Mama said, ‘Isn’t he beautiful, Anna?’'    
'And I was,' Caleb finished.    
Caleb thought the story was over, and I didn’t tell him what I had really thought. He was homely and plain, and he had a terrible holler and a horrid smell. But these were not the worst of him. Mama died the next morning. That was the worst thing about Caleb.    
'Isn’t he beautiful, Anna?' her last words to me. I had gone to bed thinking how wretched he looked. And I forgot to say good night.    
I wiped my hands on my apron and went to the window. Outside, the prairie reached out and touched the places where the sky came down. Though the winter was nearly over, there were patches of snow everywhere. I looked at the long dirt road that crawled across the plains, remembering the morning that Mama had died, cruel and sunny.    
They had come for her in a wagon and taken her away to be buried. And then the cousins and aunts and uncles had come and tried to fill up the house. But they couldn’t.    
Slowly, one by one, they left. And then the days seemed long and dark like winter days, even though it wasn’t winter.    
And Papa didn’t sing.    

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