What is A? pls help

It should be called the amniotic sac-

it's the fluid sac in which the fetus develops (it's also what bursts when it's called "breaking water"

Explanation:

answer; /// i believe the correct answer is (thrombocytopenia); (a)

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.