Simple english question

"at"

Preposition- shows a relationship between a noun and pronoun in a sentence

noun- a person place or thing.

verb- an action word

adjective- a word that modifies a noun or noun phrase or describes it's referent.

pronoun- part of a speech that can be used to replace a noun

definite article- expresses an English word "the", indicates a specific person or thing

adverb- a word that describes a verb or an adjective

"Shrek" is a noun

"heard" is a verb

"the" is an adverb or definite article

"carolers" is a noun or verb

"singing" is a noun or verb

"at" is a preposition

"his" is a pronoun, noun, or an adjective

"neighbor's" is a noun, adjective, or verb

"front" is a noun, adjective, or verb

"door" is a noun

for me, doing projects and performance tasks.

explanation: