In the skeletal system, these structures are responsible for connecting bones. A.ligaments and tendonsB. cartilage and calciumC. tendons and musclesD. bones and ligaments

Ligaments and Tendons

Explanation:

Ligament - A small band of dense, white, fibrous elastic tissue. Ligaments connect the ends of bones together in order to form a joint.

Tendon - A tough, flexible band of fibrous connective tissue that connects muscles to bones.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.