How can biomass fuel instead of gasoline in car engines conserve natural resources. a- it makes cars run faster b- it burns more fossil fuel c- it reduces the use of coal] d- it uses a renewable source

The correct answer is D. It uses a renewable source

Explanation:

Biomass fuel refers to a type of fuel or combustible that is derived from plants or animals, for example, wood, corn or manure. These type of fuel is considered to be better for the environment than gasoline and regular fuels, this can be explained as gasoline derives from petroleum that is a non-renewable source, also the extraction of petroleum leads to damages in the environment and its use causes the emission of CO2 and other nocive substances. On the other hand, biomass fuel derives from renewable sources, for example, plants can be replaced in a short time, also, these emit fewer pollutants. According to this, it can be concluded biomass fuel instead of gasoline help conserve natural resources as biomass fuel uses a renewable source (option d).

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be