Answer:
Adverb
Pronoun
verb
Adjective
interjection
preposition
conjunction
Step-by-step explanation:
Adverb - Slowly describes how he climbed
Pronoun - He she they are pronouns
verb- to believe is an action
Adjective - waterfalls is a noun and sparkling describes how the waterfalls look
interjection - ouch is an abrupt remark
preposition - by expresses relation from one part of the sentence to the other part of the sentence
conjunction - but joins two sentences that could have also been two separate sentences