Lucia has always been what some researchers call a cooperator; that is, someone who gives freely of her time, her money, and so forth, usually irrespective of the behavior of others. Cooperators, though small in number in society, are very important because most people are .

reciprocators who cooperate only after seeing others do so

Explanation: Often time, most people are reciprocators who cooperate only after seeing others do so. As human, we tend to assist fellow humans when we see that someone takes the first step on how we can help. Many a times, its scares for people to take the initiative to help others.

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answer; motor cortex;