nothing
Its conjunction - used in connecting words, phrases, or clauses.
A verb: Our company's goal: connecting the world! An adjective: The connecting door led into their bathroom.
The cerebral cortex is responsible for speech thought and memory
Responsible is an adjective.
commutator
Conjunctions such and, but, & or.
"Teaches" is a verb. "Which" is a pronoun. which part of speech is become
'His' and 'he' are pronouns
Suffixes are parts of words, therefore they are not parts of speech. Parts of speech are full words like LOGICAL - CAL is a part of that word that is an adjective.
He, she, and it are pronouns, which are a part of speech that replace nouns to avoid repetition in a sentence.
Responsible speech should exhibit sense - not nonsense, sincerity - not cleverness, forthrightness - not superficiality, and should never be part of a plagiarized work.
adverb