Anoxia, or a lack of oxygen in bodies of water, leads to

irreversible brain damage and death

Explanation:

    Anoxia is a condition characterized by a lack of oxygen in the brain, which can lead to the death of neurons and result in irreversible brain damage. Anoxia can happen due to bleeding or respiratory arrest, for example, and the longer the brain is left without oxygen, the more severe the consequences.

    The severity of the injury is also related to the region of the brain that has no oxygen supply. As the central nervous system hardly regenerates, the lesions may be permanent.

true. earthquakes are felt whenever there is a slip around a fault in the rocks below the earth. this reorientation of faults create sesmic waves and is known as earthquake, the severity of which is measured in richter scale. these are more prominent in hilly regions as the rocks usually form faults to balance the pressures on it.