Rise: when someone or something moves in an upward motion
“The sun rises at 6 am.”
Arise: is used when people are made aware of something
“A problem arose at the meeting last night.”
Arise means to get up etc. but it’s only used in writing in that way.
In another thread, I’ve just explained the difference between ‘laying’ and ‘lying’ to you. Raise/rise works in exactly the same way.
‘Raise’ needs a direct object, like ‘lay’. ‘Rise’ doesn’t need a direct object - the person or animal performs the action on themselves.
Here’s a summary containing lay/lie and raise/rise.
For more information, search online or in a grammar book for ‘transitive and intransitive verbs’.
English Grammar Tests, Elementary Level