The law of demand states that a price and quantity demanded do not affect each other. b as price increases, quantity demanded increases. c as price increases, quantity demanded decreases. d supply, price and quantity demanded do not affect each other.

c as price increases, quantity demanded decreases.

Explanation:

The law of demand states that the higher the price of an item, the lower the quantity demanded of that good. While the lower the price, the higher the quantity demanded.

This shows an inverse relationship. As the price of a commodity increases from a former price to a new price, the consumers of that commodity would purchase less of it. But if the reverse is the case, that is price is lowered, consumers would purchase more quantity of the commodity.

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.'

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