Which of the following activity is a good aspect of reverse engineering in ethical hacking?

In cybersecurity, reverse engineering is the process of taking a piece of software or hardware and analyzing its functions and information flow so that its functionality and behavior can be understood. Malware is commonly reverse-engineered in cyber defense. Moreover, reverse engineering can also be used to create pirated copies of copyrighted software or hardware. In some cases, hackers may even create new versions of existing products with added features or improved performance.