Identify the fossil fuel,
sand
wind
coal

Coal

Explanation:

A fossil fuel is a fuel formed naturally over time from the remains of once-living organisms.

Sand and wind are not fossil fuels.  Sand is formed when rocks and stones are finely ground down.  Wind is the movement of air caused by different pressures.

Coal is a fossil fuel.  It is formed when dead plant matter decays and then is exposed to high temperature and pressure over millions of years.

answer and explanation;

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).