Question

When Tito lifts the heaviest object he can, he is testing his _____.

Answer 1

When Tito lifts the heaviest object he can, he is probably testing his ability to lift weight. In other words, he could also be testing his upper body muscle strength. The process is called weight-lifting and it is designed to test the muscle strength of your upper body. 

Answer 2

Explanation :  When Tito lifts the heaviest object, he is testing his strength.

We know, strength is the quality of the physical energy and potential of the person. The strength of the person is power and his capacity.

So, we can say that When Tito lifts the heaviest objects then he is testing his strength, potential, and power.