Earth happens to orbit the sun within the so-called "Goldilocks zone," where temperatures are just right to maintain liquid water on our planet's surface. Water covers roughly 71% of Earth's surface, with most of that water located in our planet's …………… .

1. Ice-caps
2. Glaciers
3. Oceans
4. Rivers

Assertion (A): Water on earth drastically tones down day and night temperature variation.

Reason (R): Water can absorb enormous amount of heat without causing much change in its temperature.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): The earth is the only planet known to support life.

Reason (R): The earth is a terrestrial planet like Mercury and Venus.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

Assertion (A): Earth is a watery planet that supports life.

Reason (R): Distribution of water is responsible for moderating the surface condition of the earth.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.