Read the sentence.
the squirrel reached for the birdfeeder, for he saw it was filled with an abundance of sunflower seeds.
the word for in the sentence is used as both
a gerund and an adverb.
a noun and an adjective.
a preposition and a conjunction.
a verb and a demonstrative article.

The answer to the question is a preposition and a conjunction. The word "for" is a preposition as it is used before "he" to relate this pronoun to the squirrel. For is also a conjunction here in that it is connecting two independent clauses together, this one "the squirrel reached for the birdfeeder" and this one, "he saw it was filled with an abundance of sunflower seeds."

Afirefighter is a rescuer extensively trained in firefighting, primarily to extinguish hazardous fires that threaten life, property and the environment as well as to rescue people and animals from dangerous situations.  just cut some parts to make them shorter and add some of your facts or what describes them most. or what they are supposed to do.