Which option is the best action for the forest surveyors to take in the following scenario?

A group of forest surveyors discovers a section of a forest that is dying. They check the trees and discover that a strain of disease has caused them to die. Even though the saplings look like they are dying, they discover that the saplings and plants on the ground are not diseased, just malnourished.

The surveyors hire a group of loggers to bulldoze the entire section of forest and let the forest regrow as it naturally would.
The surveyors decide to cut down all the plants and construct new buildings on the land rather than regrow in a diseased area.
The surveyors hire a group of loggers to cut down the diseased trees in order to allow the plants and saplings to receive light and nutrients.
The surveyors decide to leave the area in its current condition, which will allow the forest to handle the tree disease as it naturally would.

What is the difference between bacterial infections and viral infections?

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).