PLEASE HELP ASAP! Human activity has the potential to harm ecosystems and reduce the number of organisms present in those ecosystems. Which statements below correctly describe negative consequences of decreasing the plant and animal population in an area?

Mark all that are correct.

A) As the amount of water pollution increases, water erosion increases and reduces the amount of soil in an area.

B) If the population of pollinating insects is reduced, flower populations may decrease.

C) Pollution that kills bacteria reduces the amount of nitrogen in the soil, thus affecting plant life.

D) When the waterways are removed, wetlands can potentially become flooded.

Copper, silver, aluminum, cobalt, chromium, mercury 

For cyclohexane compounds drawn in a chair conformation:   -axial bonds are vertical  -equatorial bonds are parallel to two bonds within the ring.  thus, as i assume the chair conformation is drawn:   -the x group is in an axial position, as are the five other vertical bonds.  -three axial bonds are on the top face of the ring  -the other three axial bonds are on the bottom face  the position of the second substituent on each ring carbon is equatorial.  gauche groups must be on an adjacent carbon such as carbon 6 and carbon 2, and also gauche groups are rotated by 60 degrees relative to each other.  drawing the newman projections for c1–c2 and c1–c6 aids in visualizing the groups that are gauche to the y group on c1.  click this link and watch some academic videos that may you more understand the topic 

False, as a substance changes from a solid to a liquid and from a liquid to a gas the molecules get farther apart from each other