D. remaining well -hydrated while exercising is best, when you perspire from exercise you have to replace fluids or you will de-hydrate which is not safe.
When a sperm and an egg are combined they create a zygote.
The most used "drug" is alcohol.
Answer:
D) Majority; unvaccinated
Explanation:
Herd immunity is a form of immunity that occurs when the vaccination of a significant portion of a population (or herd) provides a measure of protection for individuals who have not developed immunity
