Question

Submarine canyons are __________.

(a) found worldwide, on all kinds of shelves
(b) steep-walled and narrow
(c) cut into firm rock
(d) cut into the shelf and may extend almost to the shore
(e) all of these

Answer 1

Submarine canyons are all of the listed options: found worldwide, steep-walled and narrow, cut into firm rock, and they can extend from the deep sea close to the shore.

Step-by-step explanation:

Submarine canyons are (e) all of these. They are indeed found worldwide, on all types of continental shelves. These geological formations are typically steep-walled and quite narrow, indicating that they have been cut into firm rock. Additionally, submarine canyons cut into the continental shelf and often extend nearly to the shore, illustrating their significant reach from the deep ocean towards the coastal regions. When discussing such features, the reference to the shelf is pertinent as it is the flat part of the continental margin that lies between the shoreline and the shelf margin, normally in depths less than 180 m (600 ft).