When meredith is with her friends, she is very talkative and outgoing, but when she meets new people, she is often shy and quiet. meredith's behavior is a good example of how makes people difficult to study?

I'm pretty sure your answer should be Reactivity. I hope this helps! =^-^=

The answer is reactivity.   A reactive person is one who waits for things to happen for her to react. These people alter their behavior when they believe they are being observed. Depending on the situation they are in, these changes can be positive or negative.

every society, in order to meet the needs of it's people, has to answer three basic questions:

- what should we produce?

- how should we produce it?

- for whom should we produce it?

this questions must be answered in order to, option b, aid in production decisions.

every country can't produce everything, no matter how rich their land is. it may be a matter of technology, resources or geographical conditions. so, these three questions must be resolved in order to get the most of the production of each land.

hope this !