An experimenter visits a preschool with a big box of markers and paper. The children are told that they can draw as many pictures as they want. The children enjoy the task very much. On another visit, the children are told that, for every picture they draw, they would earn a prize. Two weeks later when the experimenter returned, he offered up the markers and paper for play but said that no prizes would be given. The children played very little with the markers because extrinsic rewards can undermine motivation

intrinsic  

Explanation:

Intrinsic motivation: In psychology, the term intrinsic motivation is described as a process which says that an individual's behavior is being operated through various internal rewards. Intrinsic motivation determines an individual's motivation to evolve in specific behaviors that significantly arises from within him or her as it ought to satisfy the person naturally.

Example: An individual studies hard because he or she likes to study.

In the question above, the given statement signifies the intrinsic motivation.

many citizens are in danger of contracting a food-borne illness.

more people are living with chronic illnesses.

pathogens are becoming stronger and harder to defeat.

edge nuity

answer; archaeologists;