Bob is a doctor in a rural farming community. often people pay him by bringing him produce from their farms instead of using money. this is a example of A) bartering
B) using credit
C) repaying a loan
D) accumulating debt

This is an example of bartering.

Explanation:

Bartering is when you trade goods or services, for goods or services.

So, your answer is A. Bartering.

the wrong statement is - c. a desert had more biodiversity than a marsh.

the deserts are one of the places of the planet where there's the least biodiversity. the reasons for that are the climate and the lack of food sources, which hampers both the number of the species that can survive in it, and the number of the individuals in the species itself.

the marshes, on the other hand, are places where there's perfect conditions for lots of organisms to thrive. the temperature is moderate and nice, the amount of water and the food sources are on a high level, so there's an abundance of both plant and animal life in them.