What is natural selection in easy words for AP psych

Since gaining independence from spain and portugal, many latin american nations have faced similar struggles. choose a common issue discussed in this lesson, such as the influence of military dictatorships, struggles with democracy, or continuing revolutions and coups. in a short paragraph, discuss how that struggle has affected two latin american nations.

Physical needs include: a. the need for sleep b. the need to feel safe c. the need to feel secure d. all of the above

Why does the blending of many different diciplines present both challenges and opportunities to enviromental scientist?