Answer:
These are the nouns in the sentences:
Plane, airport, girl, glass, table, cat, string, yarn, I, teacher, store, dime, bank, spider, floor, child, bus, monkey, banana, book, library, bear, and mud.
Step-by-step explanation:
Let's remember that a noun in grammar is a word used to identify any of a class of people, places or things, or even to name a particular one of these. This is the official definition of a noun, but in a more easy way for you to understand, we can say that a noun is everything you find in a sentence; these things can be a person, an animal, a place, an idea, an emotion, etc. Those things are going to be the ones in which the rest of the sentence is going to be built.