A bear is tied to a point in the center of a large yard, so the area the bear is able to explore is circular. The chain is 20 feet long. What is the area of the region the is able to explore?

Which statement best describes how waves impact beaches? question options: a. beaches change over time as waves move further up the shore. b. beaches change little over time as waves follow the same patterns year after year. c. beaches change little over time as wind patterns stay the same. d. beaches are always changing due to factors such as waves adding and eroding sand.