Answer:
B. diaphragm
Explanation:
this structure flutters and causes the chest cavity to largen
One of the most abiotic factor that may affect humans directly is waster availability because with out water we can get dehydrated and die.
<u>Radiometric</u> dating uses a radioactive substance to determine the <u>absolute </u>age of something.
Answer:
producers
Explanation:
All the energy comes from the sun. a small amount of sunlight energy is trapped by green plants and used in photosynthesis to form organic materials in plants that are sources of food to the rest of the animals. Animals get this energy when they feed on plants directly like the herbivores or indirectly like the carnivores.