B. Steroid hormone
This is because most hormones are steroids, that send long distance signaling throughout your body.
Do you have a picture? It would really help answer your question
A is the answer. It’s like addition.
Coastal habitats provide ecosystem services essential to people and the environment. ... Services provided by coastal wetlands include: Flood Protection: Coastal wetlands protect upland areas, including valuable residential and commercial property, from flooding due to sea level rise and storms. pollution kills much of the life that lives there and radically decreases biodiversity