Answer:
D
Explanation:
Everything in there pollutes the environment.
Sound intensity is the intensity/volume of sound. Frequency is how high or low the sound is.
Answer:
Pneumonia is an infection of the lungs caused by bacteria virus fungi or protozoa in rare condition.
mechanical weathering
Mechanical weathering is the process of breaking big rocks into little ones. This process usually happens near the surface of the planet. Temperature also affects the land. The cool nights and hot days always cause things to expand and contract. That movement can cause rocks to crack and break apart.Mechanical weathering involves mechanical processes that break up a rock: for example, ice freezing and expanding in cracks in the rock.