Question

select the word that means performing tasks without being wasteful. the sloth is one of the worlds least active animals. it spends most of its time hanging in trees and sleeping. but some people have wondered if sloths really deserve their reputation for laziness. with all their hanging around, maybe sloths are just being efficient. sloths eat mostly leaves, which provide very little energy. therefore, sloths bodies may have adapted to allow them to save energy by moving slowly.

Explanation:

The text defines the concept of performing tasks without being wasteful as being efficient. The example of sloths shows they move slowly to save energy given their low - energy diet, which is an example of being efficient.

Answer:

efficient