It ensures only key ideas are included.
It keeps the list of actions to a minimum.
It makes sure that only essential ideas and points are included.
Answer:
A buffer
Explanation:
A buffer is composed of a weak acid and a conjugate base. They are resistant to pH because of equilibrium between the acid and its conjugate base.
It is a passageway for urine and semen.
Parasitism, that should be the correct answer for this question!
Parental neglect I think is the answer