The answer to the question is B......
What part of it are you confused about
This equation represents a single replacement reaction. Single replacement reactions consist of one element reacting with one compound on the reactant side (left side of the equation) and they form one new element and one new compound on the product side of the equation (right side).
I belive it is synaptic cleft
Water is made of only one molecule which can be chemically separated into hydrogen and oxygen. The answer is D.
