Answer:
C: Earth scooped out that can form a lake or deep valley
Answer:
The heart pumps blood through the circulatory system, delivering needed materials (glucose, oxygen) and picking up waste (carbon dioxide) from cells all over the body. Organs systems work together to efficiently and effectively provide all body cells with their basic needs to carry out life functions.
They eat producers in order to survive
I would say it is d) respiration
Respiration is just another word for breathing :)