If the number of trees on earth continues to decrease significantly, what might be the result? a. less oxygen released into the atmosphere and more co2 buildup; erosion could occur without the tree roots to hold the earth in place; loss of habitat of many animals and diversity could decrease b. balance of nitrogen and phosphorus in the ecosystem and the movement of water through the ecosystem could be thrown out of balance c. a and b d. none of the above

Option (c) is the correct answer.

Explanation:

Trees are the main source of generation of oxygen into the atmosphere. They provide us fresh air to breathe and consume the required amount of carbon dioxide present in the atmosphere.

So, if we cut large number of trees then there will be decrease in oxygen content into the atmosphere. Trees also act as habitat for many animals and birds. Cutting of trees will also cause loss of habitat and leading to erosion of soil as plant roots won't be available to hold the earth in place.

A disturbance in water cycle will also occur due to excessive cutting of trees.

Hence, we can conclude that the following statements are true.

Thus, we can conclude that option (c) correct.