A 17-year-old college-bound student receives a vaccine against an organism that causes meningitis. This is an example of a. secondary prevention. b. disease treatment. c. tertiary prevention. d. primary prevention.

The correct answer is option d. "primary prevention".

Explanation:

In health promotion, primary prevention are known as any activity or action that helps to prevent the development of an injury or a diseases before a person starts to suffer from it. Vaccination is a classic example of primary prevention. Other example of primary prevention is changing risky behaviors, such as having bad sleeping habits or eating junk food.

every el niño cycle is different. every year.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: