Answer:
the answer would be B. Digestive system, Muscular system, endocrine system, nervous system
Aerobic exercise is the body producing energy WITH the use of oxygen (light activities like jogging). Anaerobic exercise produce energy without the use of oxygen and is typically a higher intensity that burns fat AND helps gain lean muscle mass (these are activities like weight lifting).
Answer:
not enough clean oxygen being produced for us to breathe, loss of habitat for countless species causing them to possibly go extinct.
Answer:
People are call people because a group of human being in a group is call people; we're all people.
Explanation:
