CBSE Questions for Class 10 Biology Sustainable Management Of Natural Resources Quiz 4 - MCQExams.com

• The ultimate source of water is the water bodies which are present on earth which includes large oceans, seas, rivers, etc. Rain is only the way of water returning to their sources which they have lost by evaporation.
• This rain is not an ultimate source of water .the ultimate source are the water bodies present on earth example large oceans, rivers etc
• So, the correct answer is 'False'.

• Water is one of the most valuable resources on Earth. Rainwater fills reservoirs that supply drinking water, provide a habitat for fish to live, and nourishes the soil with water necessary for vegetation.
• Hence Heavy rainfall is not responsible for water shortage.
• So, the correct answer is 'Heavy rainfall'.

• The hotspots are the richest reservoirs of wildlife that are under threat and need immediate attention for their conservation.

$$\textbf{Correct answer: C}$$ 

$$\textbf{Option (A):}$$ 

$$\bullet$$ Making stringent laws about the conservation of wildlife is important to reduce hunting and poaching practices. But it is not the only manner in which wildlife can be conserved. 

$$\textbf{Option (B):}$$ 

$$\bullet$$ Making zoological parks is a good way of ex-situ conservation.

$$\bullet$$ This is a process in which the animals are conserved in an environment which is different from their natural environment.

$$\bullet$$ This is a way to increase the population of wildlife in a controlled environment. But the environment is different from the natural environment which is not completely perfect for the best conservation.

$$\textbf{Option (C):}$$ 

$$\bullet$$ Numerous sanctuaries present as protected spaces in which the wildlife is conserved in their natural habitat.

$$\bullet$$ This is a process of in situ conservation in which the animal is protected in its own habitat to thrive and survive better.

$$\bullet$$ This is the most suitable option for the conservation of wildlife.

Hence, the correct answer is option (C).

• The dead animals, fallen leaves, etc. all get collected on the floor of the forests.
• The decomposers act on it and convert it into humus.
• The humus mixes into the soil and make the soil nutritious for plants.
• The seeds fall on the floor of the forest and grow using nutrient present in the soil.
• The seed again grow into a plantelet.
• This way, the forests keeps on growing and changing and can regenerate.