most likely a beetle because of how fat they can get (big)
Both are correct sentences, but "The ant is an insect" is more specific as it refers to a particular ant. "An ant is an insect" is a general statement about ants as a group.
Ant and aphids or any small insect.
ant
Ants are herbivores. They eat sweet thing like watermelon and honeydew.
Insect
I am an ANT and my insect name in my name is Steve.
ant is a smallest insect
Ant
ant aphid
ant
It is an insect.
a ant.