In year 1 the average price of X is $10, and in year 2 the average price of X is $23. Still, consumers buy more units of X in year 2 than in year 1. It follows that

Demand for good x could be higher in year 2 than year 1

Income may have been higher in year 2 than year 1

Explanation:

In the given scenario there was an average price of product as $10. To calculate average cost it is total sales revenue divided by number of units sold.

In year 2 the average price is $23. This means that for each unit sold in year 2 the price was $23 an increase of $13 from year 1.

For this to have happened first there could have been higher income of the consumer in year 2 and they will have more to spend on the product at a higher price.

There will also need to be an increase in the demand for the good this will increase units sold and also price will go up.

press the paper clip and attach a file!

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.'