What are sensation and perception? What do we mean by bottom-up processing and top-down processing? (Write 800 words please)

Which of the following is something every person can do plz asap apex

Why is the theory of evolution important? it disproves all other theories about how life began. it provides a topic for debate. it is a unifying concept in biology. it explains how life began. i know for sure, it is not "it is a unifying concept in biology."

Explain how the political influence of african americans leaders became weaker.