1. All thriving things need energy in order to defend themselves (escape danger) and perform functions such as growth, maintaining balance, repair, reproduction, movement.
Sorry, I don't completely understand the second one
C) neurons - nerve tissue - brain - central nervous system - human being
Answer:
The inner core has the highest density
Explanation:
Despite high temperatures should be melting the metals in the inner core, the extreme pressure keeps the earth's inner core in a sold phase. The solid metals make the earth's core very dense, at about 17 g/cm³
