.
What does "this" refer to? Choose the idea that completes the sentence.
This leg was specifically designed for rock climbing and has
many features that can help the climber, such as the spiked
foot, which grips the rock face better than any biological foot
could. Other prosthetics can help people excel at the sports
they love, too.
Engineer Hugh Herr has made this his life's work.
Engineer Hugh Herr has made
his life's work.
teaching rock climbing
designing prosthetic limbs
strengthening biological limbs
1) discovering challenging rock faces

designing prosthetic limbs

Explanation:

this is because the first line of the image says that it was designed, and the 4th line practically tells us that it was the prosthetic that was designed, and then the last line says that Engineer Hugh Herr has made this his life's work which means designing prosthetic limbs is what he has made his life's work

it wouldnt be considered cheating as long as you dont copy the answered we give here word from word.

also remember that some online schools have things that can tell if you have copy and pasted anything into your report.

answer: i declare that all people should be free

explanation: