| 1. They have gentle slope and they extend up to 200m depth. |
| 2. They are quite wide where mountains are close and parallel to the coast. |
| 3. They are narrow where there are wide plains near the coast. |
| 4. The widest continental is off the Arctic coast of Siberia. |
A) ?1 and 2 are true
B) ?2 and 3 are true
C) ?3 and 4 are true
D) ?1 and 4 are true
Correct Answer: D
Solution :
?Continental shelves are narrow where high mountains are close and parallel to the coast. For example, off the west coast of South America where the Andes Mountains are very close and parallel to the coast, the shelf is only a few hundred metres wide. Continental shelves are quite wide where there are wide plains near the coast. For example the width of the continental shelf is about 560 km off the coast of Rio de La Plata.
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