Final answer:
Stress testing is done to ensure MobileApp exhibits graceful degradation on failure.
Step-by-step explanation:
Part of the reason for stress testing is to ensure that the MobileApp exhibits graceful degradation on failure. This means that even if the app encounters a failure or error, it should still continue to function, although perhaps with reduced features or performance. The purpose of stress testing is to identify any weaknesses or points of failure in the app's design so that developers can address them and ensure that the app handles failures in a graceful manner.