The unit of frequency is hertz (Hz)
Hope this helps. if not, I am sorry.
Answer:memory , movement , body , the nervous system
Explanation:
Tropical forests is the answer.....
In this graph it shows that chlorophyll absorbs blue light the most so it won't reflect as much blue light back into our eyes as green.
Simpler sentence: Blue light is absorbed and used for photosynthesis so it is the least visible to the human eye.
By studying meteorites and using radioactive dating techniques to estimate the age.