They had to change they way they live which is quite difficult it is like you going to a new school in a new state and not being used to anyone
If a portion of the grass was destroyed by wildfire, then the population of bison that feed on the grass will decrease. This is because there would be very little grass left for them to eat, and they don't eat anything else.
For the second wig its decreasing
Fires in grasslands prevent the growth of shrubs. Plants can survive in these fires because most of them have parts underground, where fire cannot reach. Animals and runners aren't affected by this, because they can leave.
Answer;
A. brain's use of incoming signals to construct perceptions
Explanation;
Bottom-up processing involves processing information by starting with the individual elements of a visual stimulus and gradually building up a final representation and interpretation.
The evidence of bottom-down processing by Hubel and Wiesel showed that we have neurons that pick up specific elements of a visual stimulus and then they are assembled into a more complex form.