Homosapians started to use tools.
Answer:
The hormones then diffuse to the bloodstream via capillaries and are transported to the target cells through the circulatory system. This allows hormones to affect tissues and organs far from the site of production or to apply systemic effects to the whole body.
Explanation:
Krill, snails and abalones are primary consumers
You were right, the answer to this is C.
