(1)Jack is . He never spends money on anything. When friends come over to his house, he only offers them water because he thinks juice is too expensive. When it’s his turn to pay for lunch, he buys everybody the cheapest thing on the menu.

Poor or cheap actually what do you want to know?

cognitive activities are mental processes through which we make sense of the world around us or get to know or experience our environment (internal and external). examples of cognitive activities are reasoning, thinking, perceiving, decision-making, listening, observing,etc.

answer: i would say the brain but it seem that you have a brain.