Interest on an investment is

a. financing
b. a fee
c. a penalty
d. profit

d

Explanation:

as investment makes the business grow financially and periodically investors receives extra amount of money which is known as an interest on investment or profit.

D.Profit

Explanation:

An interest is the amount of money which is paid to the person who invests his money with a bank or any financial institution. The investor enjoys this interest amount for investing his principal amount with the institution. So such type of interests are considered profit on an investment. The investor invests his money for a fixed amount of time with the bank or financial institution and for this he gets this interest amount with the profit on the principal amount.

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.'

1. c

2. b

3. a

4. c

5. a

6. b

7. c

8. c

9.b

10. d

just took it 100%