Arnold is concerned about his impact on the environment. currently he drives a car that gets only 12 miles per gallon of gas. which of the following actions would be the most effective to lessen his environmental impact? a) driving at a higher rate of speed b) switching to a car that gets 30 miles per gallon c) purchasing higher octane gas d) traveling by plane

B) switching to a car that gets 30 miles per gallon

Explanation:

Driving a car at a higher rate of speed poses negative impact on the environments which Arnold is trying to change . A is wrong because it's life threatening.

Purchasing higher octane or premium gas also requires upgrade on Arnold car engine which was never mentioned. So buying premium gas will only aggravate the environmental devastation and reduce the engine life span because the car engine is not compatible with premium gas.  

Travelling by plane also possess it own environmental degradation.

The best option is switching to a car that gets 30 miles per gallon. This will drastically reduce the toxic gas output.  

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.