How Nature Works in Harmony Class 8 Assertion and Reason Questions

How Nature Works in Harmony Class 8 Assertion and Reason Questions

How Nature Works in Harmony Class 8 Assertion and Reason Questions

Following questions are of Assertion (A), Reason (R) type questions. Choose the correct answer from the following options:

(a) Both A and R are true, and R is the correct explanation of A.

(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.

(d) A is false, but R is true.

1. (A): Elephants often enter farms and villages when their natural habitat becomes scarce.

(R): Changes in rainfall and temperature affect vegetation, leading to habitat loss for elephants.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

2. (A): Decomposers play a crucial role in ecosystems by recycling nutrients.

(R): Without decomposers, ecosystems would have an excess of living organisms.

Answer:

(c) A is true, but R is false.

3. (A): Human activities like deforestation and pollution threaten ecosystems.

(R): Healthy ecosystems provide clean air, water, and food for human survival.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

4. (A): Human-made ecosystems, like farms and parks, do not require management.

(R): Well-designed human-made ecosystems can help reduce pollution and support biodiversity.

Answer:

(d) A is false, but R is true.