Question

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

Explanation:

The question is about identifying a disadvantage of petroleum. The first option "It can be transported in a variety of ways" is an advantage as stated in the passage (it is easy to transport). The second option "Spills that occur have negative effects" is a disadvantage because petroleum spills (like oil spills) harm the environment, wildlife, and ecosystems.

Answer:

Spills that occur have negative effects.