50 POINTS + BRAINLIEST TO THE CORRECT ANSWER

3. A student wanted to study the effect of temperature on algae levels in a local stream. Which items are most useful for gathering data and most appropriate for communicating the results of her observations?

a. Research on the Internet and videotapes of water samples.

b. Microscopes and written descriptions of weather patterns.

c. pH strips and written observations of stream water.

d. Test tubes, thermometers, and graphs of results.