In order to create a hydroelectric power plant, you need water, hence the prefix hydro-. Most times, people use dams to block the water, which in a way stores it. When you need to produce electricity, you release some of the water which flows through a turbine making it spin, which then activates a generator to produce electricity.
Answer: Does the black sqaure represent disease? If so, emma is #1. As for the others i think i need more context
Explanation:
<span>Arms of primates and wings of birds are variations of FORELIMBS</span>
Organ- a group of tissues in a living organism
examples- heart, lungs, liver, kidney, and stomach
