The environment is your correct answer<span />
I believe the answer in the blank should be protostar
Answer:
Mining
Explanation:
The other three natural ways of helping replenish the environment.
The correct option is C.
In chemistry, a radical is defined as an atom, ion or molecule that possess an unpaired valence electron. Generally, radicals are highly reactive chemically. Examples of radicals are hydroxyl, hypochlorite, nitrate, carbonate, oxalate, permanganate, etc. Free radicals combine with one another or with single atoms to produce neutral substances. In the question given above, the two compounds given in option C have the same type of radical, which is hydroxyl radical.
The answer to this is the nucleus
