Answer:
Explanation: Red Blood cell:The main job of red blood cells, or erythrocytes, is to carry oxygen from the lungs to the body tissues and carbon dioxide as a waste product, away from the tissues and back to the lungs.
White blood cell:White blood cells are a part of the immune system that helps fight infection and defend the body against other foreign materials.
Platelet:are a component of blood whose function is to react to bleeding from blood vessel injury by clumping, thereby initiating a blood clot.
Plasma:. Plasma contains proteins that help blood to clot, transport substances through the blood, and perform other functions. Blood plasma also contains glucose and other dissolved nutrients.The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it.
Answer:
Eat healthy foods.
Take a daily prenatal vitamin.
Stay hydrated.
Fats made when manufacturers add hydrogen to the fat molecules in vegetable oils are called Trans Fats
Health behaviours that involve restorative activities such as relaxation and renewal help restore emotional balance among people.
<h3>What is health? </h3>
Health can be defined as a state of body when all the organs and organ systems are functioning properly in their physiology and a perfect balance is maintained between the environment and the body.
It can be also defined as a state of complete physical, mental and social well being.
Health is more than just absence of disease only.
When a man does all his normal physical and mental activities without any difficulty, he can be called as healthy person.
<h3>What is disease? </h3>
Disease is the sickness of the body and the mind.
It is the malfunctioning of the body due to some reasons.
Disease can be defined as a condition of the body or its parts in which the functions are disturbed or deranged.
<h3>
What is emotional balance? </h3>
it is referred to as emotional self controlling. it is state of being in which we are aware of the emotions and able to manage them in a gentle, honest and wise way.
Learn more about disease here :
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Epidemiologists are scientists who study diseases within populations of people. In essence, these public health professionals analyze what causes disease outbreaks in order to treat existing diseases and prevent future outbreaks.
Therefore the most precise answer is
D) it states both their analytical work (to study causes and patterns) and also what they pretend to achieve(to contain or treatment) but doesn't fully answer the question "Why their concern is so diverse"
A) Does not only give a full valid definition but answers the question "why they concern is so diverse (extensive)?"
because they study "ALL" diseases..
Thus, the correct answer is A