(a) If we keep cutting on trees, it will eventually lead to soil erosion, global warming and desertification. (b) If the habitat of an animal is disturbed, the said animal might attack another animals habitat or it will eventually die. (c) When the top layer of soil is removed, the lower, harder, and rocky layers are revealed. This soil has a lower humus concentration and is also less productive. Fertile land is gradually being replaced by deserts. This is referred to as desertification.