PART 2. Read the following passage and mark the letter A, B, C, or D to indicate the correct answer to each of the questions below.

Humans impact the water in different ways such as modifying rivers (through dams and stream channelization), urbanization, and deforestation. These impact lake levels, groundwater (12)_________, water pollution, thermal pollution, and marine pollution. Humans modify rivers by using direct channel manipulation. We build dams and reservoirs and manipulate the direction of the rivers and water path. Dams can usefully create reservoirs and hydroelectric power. (13)________, reservoirs and dams may negatively impact the environment and wildlife. Dams stop fish migration and the movement of organisms downstream. Urbanization (14) _________ the environment because of deforestation and changing lake levels, groundwater conditions, etc. Deforestation and urbanization go hand (15) ________ hand. Deforestation may cause flooding, declining stream flow, and changes in riverside vegetation. The changing vegetation occurs because (16)_________ trees cannot get adequate water they start to deteriorate, leading to a decreased food supply for the wildlife in an area.