Shannon wants to investigate how erosion happens along shorelines. She researches the topic and learns that atmospheric events, such as storms, can change the landscape of beaches. Shannon decides to investigate further by conducting systematic observations. Which plan would help Shannon investigate erosion through systematic observation? A. photographing and comparing the beaches before and after storms
B. collecting shells from different beaches and arranging them in size order
C. using a hose with different amounts of force to spray sand and studying the differences
D. creating a model shoreline, changing the wind speeds, and measuring changes in the landscape