After Robert Fulton invented the steamboat, he tried it out on the Hudson River.
D. interjection.
An interjection is a word used to state emotion, whether scared, angry, or excited, and is usually placed at the beginning of a sentence.
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.
Since we are discussing sensory details, we are using all of our senses as Poe gives a word picture. Of course the only thing he doesn't do is taste it but he does everything else. He sees it, he hears it hissing, he feels the vibration, he smells its acrid breath.