Mountain Bike is the correct answer
I’m confused of the question your asking,can you give me more details?
I thinking A. or B. but im sure it one of them. that's a 50% chance.
I would say
a. biological pest control
biological pest control is when other plants or animals are used to control pests. There are no chemicals used only the natural roles of the environment.
Hope this helped!
Answer:
An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.