“our necks…” is an example of what figurative language?

This is an example of a hyperbole.

Step-by-step explanation:

"Straining our necks" is a hyperbole, because it exceeds the fact that technically our necks can't strain (which shows it might be personification).  A hyperbole is usually a phrase that is "stretching the truth" (even thought truth can't    s t r e t c h   ).

He did not separate his friends into different groups and he didn't apply a treatment is the correct answer because the environments and people around his friends are different. Maybe, they can multitask and he can't. The answer varies.