B)
Because it flows. I dunno about you, but that sounds like a liquid to me! Sorry if i'm wrong.
Turbines. Invented by Charles Parsons. I know I'm in middle school, but we are just learning about hydroelectric power.
Homologous structures are common structures in different species that perform different functions and may have look similar in structure.
Example- The different animals have bones that appear very similar in form and function and seem to be related.
