To Be Changed
To Be Transformed, To Be Altered
intransitive verb, godan verb
You've seen how 変える means "to change" something. This word means that something changed by itself, so it means to be changed or to be altered.
変わる refers to the act of changing into something different, and involves alterations in nature, appearance, or state. For example, it can describe changes in weather or the season, someone undergoing a noticeable change in appearance or behavior, or one's feelings or thoughts evolving over time.
Since 変わる means "becoming something different," you can also use 変わった and 変わっている to describe someone or something that's "different from what's normal." For example, you can say 変わった人 or 変わっている人 to mean "an odd person."
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You learned this reading already so you should be able to read it!
あの男は意見がコロコロ変わるので信用できません。
I cannot trust that man because he changes his opinions so often.
人の考え方は時間とともに変わるものでしょ？
People's ways of thinking change over time, don't they?
AIの進歩により、仕事のやり方が大きく変わりました。
Advances in AI have changed the way work is done.