Answer:
Andrea will study how many species in the area have gone extinct or endangered.
Explanation:
They plot out a given area, such as 500 acres. They pick a section, maybe 100' X 100' square, and set live traps.
After catching the rabbits, they do a count and note sex, age, health. and size, then turn them loose. The number of rabbits caught, times how many 100' X 100' sections there are in 500 acres, gives them the approximate amount of rabbits in that 500 acre area.
This kind of thing is done for most animal populations, except for those that can't or shouldn't be caught. Those animals are often counted by observation or by photography and then multiplied by the given area as I said.
-- From Google.
Visible light is a form of electromagnetic radiation as in radio waves, infrared radiation, ultraviolet radiation, X-rays and microwaves. Generally, visible light is defined as the wavelengths that are visible to most human eyes.
EXAMPLES:
For example, the sun produces visible light.
Incandescent light bulbs, fluorescent, and neon lights are other examples of visible light that we may see on a regular basis.
Visible light is probably the most important of all electromagnetic waves for most of us.
