Because resources are scarce, all choices involve trade-offs, which means nothing is free.

O True O False

True

Explanation:

Resources are scarce and human wants are unlimited. This leads to an individual making choice. The individual would make choice that would maximise utility. In making choices, opportunity cost arises.

Opportunity cost is the cost of the next best option forgone when one alternative is chosen over other alternatives.

This shows that nothing is free.

I hope my answer helps you

i mean, there is a lot of homeless people. but it is a very busy place and always in need for people who can be busy so it's not impossible to find one.

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'