The answer is B... im just making a guess so...
Answer:
Enzyme Activity- Responsible reactions Enzyme catalyze nearby substrates
Cell to Cell Recognition- Recognize molecules on surface of the other cells
Cell Signalling- A chemical messenger that binds a membrane protein causing to change shape and relay the message inside a cell.
Transport materials- Provides channels for a certain solutes to pass through membrane
Valley-Glacier
Landslide-gravity
Frost wedging-ice
Canyon-river
I think this is correct, sorry if I’m wrong :)
