Why might natural selection have favored hands with fingers capable of precise movements in Homo erectus?

Question

Quizplus · Accepted Answer

Fine motor control is crucial for tool use, which in turn allows for accessing a wider variety of foods. While precise movements could aid in arboreal locomotion, there's no direct evidence suggesting this was a selective pressure for Homo erectus, making options A and C the primary factors.

Why Might Natural Selection Have Favored Hands with Fingers Capable