A craton is a large, stable portion of Earth's lithosphere that makes up part of continent. The Kaapvaal craton in Africa is one of five ancient cratons left from the
Precambrian era. The rock has remained tectonically stable since its formation 3.6
billion to 2 billion years ago. What do you think the term "tectonically stable" means?
you think this rock formation is important to understanding the history of Earth?
Do you think studying ancient rock formations such as the Kaapvaal craton can teach
scientists not only about Earth's past but also its future? Why or why not?

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.

kelp are large brown algae that live in cool, relatively shallow waters close to the shore. they grow in dense groupings much like a forest on land. these underwater towers of kelp provide food and shelter for thousands of fish, invertebrates, and marine mammal species.

e) all of the above