To form soil, the two processes which must occur are erosion and weathering, so the correct answer here is B. Soil formation is a continuous process, but also one which takes a long time. It can sometimes more than five hundred years for 1cm of soil to form.
The soil is the most essential element that is beneficial for the growth of plants. They are formed by both weathering and erosion. The process by which the rocks are broken down is known as the weathering process. This occurs both by physical as well as chemical means. The factors that are responsible for the weathering of rocks are temperature, pressure, gravity, Water, Wind, living creatures. These broken rock fragments are further transported from one place to another by the agents such as wind, water and ice are known as erosion. This finer broken fragments after deposition give rise to the formation of soil.
Thus, the weathering and erosion of rocks are the set of processes that results in soil formation.
Flooding and intrusion of salt water in the low lying areas can adversely affect human life. This can happen in the following ways:
Flooding can cause many people to die due to drowning in the flood water.
Many people lose their habitat and all their belongings due to the entry of water into the settlements having only the ground floors. These people need to rehabilitated to safer regions.
The saline water percolates through the ground and mixes with the fresh water present in the water table, thereby making them saline and non-consumable.
People have to face the dearth of food, drinking water, clothes and electricity until rescue operations are sent.
Increased chance of transmission of water-communicable or water-borne diseases like diarrhoea.
Yes. they are living and living in the backyard so therefore they are considered part of the population of the backyard. You can also include any birds, squirrels, and any other animals that you see.
