Which of the following is an example of revolving credit?

a. a loan that doesn't use collateral
b. a loan that uses collateral
c. a credit card
d. a single-payment loan

C. a credit card

A credit card is an example of revolving credit.

Explanation:

A credit card refers to a payment card usually issued by a bank or financial services company to a user in order to pay for charges against a line of credit in place of the holder’s cash deposit.  It enables the card holder to borrow money to buy things which might result in paying of interest or benefit. It measures the ability of the user to pay back her debt on time.

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.'

you're crazy if you think that someone is going to write a 500 word report for you.