Answer:
Estuaries filter out sediments and pollutants from rivers and streams before they flow into the ocean, providing cleaner waters for humans and marine life.
The correct answer that would answer the given question above would be EXPERIMENTATION. The scientific method uses observation to gather information, and to answer the questions based on the information gathered, this would involve experimentation. This is the testing of the information so that it would given a clear evidence on the answer. Hope this answer helps.
