Two statements are given in the question below as Assertion (A) and Reason (R). Read the statement and choose the appropriate option:

Assertion (A): Large number of lakes occupy the basins lying to the south of Hudson Bay.

Reason (R): Glaciers from the mountains melted and occupied the basins.

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

Give the single term for the following:

A narrow land mass linking North and South America.

Explain the differences between Laurasia and Gondwanaland.

Explain the differences between Western Cordilleras and Eastern Highlands.