The correct answer is: A. industry.
In 2020, the industrial sector consumed 37% of the natural gas used in the United States. The residential sector consumed 27%, the electrical utilities sector consumed 24%, and the transportation sector consumed 12%.
Natural gas is a fossil fuel that is formed from the remains of ancient plants and animals. It is a colorless, odorless gas that is lighter than air. Natural gas is used for a variety of purposes, including heating, cooking, generating electricity, and manufacturing.
The industrial sector is the largest consumer of natural gas in the United States. Natural gas is used in a variety of industrial processes, including manufacturing, refining, and power generation.
The residential sector is the second largest consumer of natural gas in the United States. Natural gas is used for heating, cooking, and water heating.
The electrical utilities sector is the third largest consumer of natural gas in the United States. Natural gas is used to generate electricity.
The transportation sector is the smallest consumer of natural gas in the United States. Natural gas is used to power vehicles, such as buses and trucks.