Answer:
true
Explanation:
When your eyes are not covered and you are in an area with good lighting, then opening your eyes would certainly be a necessary thing to do to be able to see and this makes your vision to be normal.
According to Leo Gross, you can have a normal vision if you are 20 feet away from a particular spot and you see what a normal person sees on that same spot. There is the Snellen chart one is also expected to read in that position, so maintaining a normal vision means someone has 20/20 vision.
Answer: Humans killing a majority of the natural predators will cause a drastic increase of the prey populations and make food,shelter and other resources scarce.
nervous and chemical responses.
Its constructive force.
hope this helps you
