What is the different between where did he go and where has he been​

Collections grade 10 guiding questions collection 6 "letter from birmingham jail" by martin luther king jr lines 66-101 why might king have taken the time so early in the letter to delve into such minute details about steps taken and recent event in birmingham?

What is a mechanism by which organisms maintain homeostasis when the level of one substance influences the level of another substance or the activity of an organ.

The black night was split open like the coconut