Explanation:
A submarine, undersea, or underwater earthquake is an earthquake that occurs underwater at the bottom of a body of water, especially an ocean. ... When the rough spots can no longer hold, the sudden release of the built-up motion releases, and the sudden movement under the sea floor causes a submarine earthquake.
To put them in order have a good grammar make it work
Answer:
a.
an informal definition
Explanation:
The definition used about corns is an informal one because the author did not make use of any kind of statistic to show that corns are vulnerable to certain kinds of worms and also did not mention the names of worms the corn is vulnerable to.
When something is said to be informal, it means it is not yet official.