Assertion: Animals that are aquatic rather than terrestrial can support relatively larger exoskeletons.
Reason: The terrestrial organisms are relatively larger than aquatic animals.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

Assertion: For moving on land, powerful muscles and strong skeletal support are more important than a streamlined shape.
Reason: Land animal must be able to support itself and move against gravity.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.