Question

petroleum is a convenient source of energy for vehicles. it is also easy to transport. what is a disadvantage of petroleum? spills that occur have negative effects. it can be transported in a variety of ways.

Explanation:

The question asks for a disadvantage of petroleum. The first option, "Spills that occur have negative effects," highlights a drawback as petroleum spills can harm the environment (e.g., soil, water, wildlife). The second option, "It can be transported in a variety of ways," is an advantage, not a disadvantage.

Answer:

Spills that occur have negative effects.