Yes A is the correct answer
Diffusion allows the exchange of substances; the entry of oxygen, proteins, etc into the cell and the removal of waste substances.
Answer:
The glucose and the oxygen travel out into the body through the circulatory system to reach cells that need energy. The cells use the glucose and oxygen from the circulatory system for energy production.
Insects has a broad range of species and they are able to easily adapt according to their surroundings, hence increasing their survivability rate
3. all the living things in the forest ecosystem.
