What is the noun clause in the sentence "whatever crawls in is trapped." and the function of the noun clause

The noun clause in this sentence is Whatever crawls in

A noun clause is used to name something when a single word is not enough. It is a dependent clause and it can not stand alone.

A noun clause usually starts with such keywords as: how, that, what, whatever, who, whoever etc.

A noun clause can function as a subject of a verb : Whatever crawls in is trapped, as an object of a sentence, as a subject complement or as a object preposition.

answer: metaphor: because there is a comparison between the treasures spread on the ground and the evil seed of adam drifting from the shoreline  

explanation:

ma”am had a granddaughter who lived a couple blocks away from her school who later on then met friends