Answer:
Adjust the light intensity until an image can be clearly seen. Change the microscope objective lens to the next highest power and repeat step 3. Once at the highest objective lens, you should see graduations that are equal to approximately 10 microns
In this passage they talking about water problem and flood, flooding means the covering or submerging of normally dry land with a large amount of water. it means that water is useful but it also dangerous.
The correct answer is letter C.
Deep sea coral reefs provide a critical habitat for many other organisms. These organisms are also known as cold-water corals that are found in the deeper and darker parts of the oceans where temperatures are extremely cold.
Sprawl has many negative consequences <span> such as higher water and air pollution, increased </span>traffic<span> fatalities and jams, loss of agricultural capacity, increased car dependency, ...</span>