That is a chemical change or reaction.
Answer: Well really the digestive, respiratory and circulatory systems all work together to make cellular respiration possible so i guess you could choose a or b
Explanation:
Explanation:
I think it's up to 100 times
Y is the best options because a secondary consumer will eat a primary consumer for energy (the grass hopper).
Answer:unsaturated
Explanation: srry if I'm wrong
