A scientist observes that the shells of oysters this year are thinner than the shells of oysters several years ago. How could this trend be related to the use of fossil fuels?(1 point) Responses Fossil fuel spills in the ocean prevent oysters from building shells. Fossil fuel spills in the ocean prevent oysters from building shells. Lower carbon levels mean that oysters do not have enough materials to build shells. Lower carbon levels mean that oysters do not have enough materials to build shells. Higher levels of ozone in the ocean keep oysters from building shells. Higher levels of ozone in the ocean keep oysters from building shells. Increasingly acidic ocean water makes building shells more difficult.

Increasingly acidic ocean water makes building shells more difficult. This acidity in the ocean is caused by the absorption of carbon dioxide from the burning of fossil fuels, resulting in lower pH levels in the water. Oysters need a certain level of carbonate ions in the water to build their shells, and the increased acidity makes it harder for them to do so.