Answer:
B. Erosion
it is breaking apart ; weathering ; breaking down; eroding
I believe the answer is C. the need to acquire energy from other organisms
This is however an educated guess, but I hope this helps! :)
Hormone Signaling. The glands of the endocrine system secrete hormones directly into the extracellular environment. The hormones then diffuse to the bloodstream via capillaries and are transported to the target cells through the circulatory system.
B? But i think you answered this one already.
Answer is B. Pioneer communities contain few species, while climax communities have many species.
Pioneer species are the first species that start life in an area. Their growth is fast and soon replaced by next community. Whereas, climax communities are made of many species. They are stable is not replaced by any other community. They are supporting new life.
