<span>Supply is determined by production costs and demand is determined by need for product
</span>
When your body is in distress and an area is “under attack”, your white blood cells rush in to help destroy the harmful substance attacking your body. White blood cells will also help prevent illnesses.
Ummmm.... you could put a straw in the cup for her...?
The correct answer is B; Adaptive theory.
Further Explanation:
The adaptive theory is also known as the evolution theory. Sleep is thought to be an evolution and that when a person is sleeping their body is conserving the energy that they need to function. This theory beleives that all humans and other species have evolved throughout time and only sleep when it is hazardous to their life.
Research has shown that animals that all animals who have only a a few natural predators will sleep up to 15 hours a day. The animals who have numerous predators will sleep only a few hours, up to five hours, a day.
There are four theories of why we sleep, they are;
- Repair and Restoration Theory
- Evolutionary Theory (adaptive)
- Information Consolidation Theory
- The Clean-Up Theory
Learn more about sleep theories at brainly.com/question/13044986
#LearnwithBrainly
a
Explanation:
ph scale is if it's a acid or a alkaline
