Confusing Concepts: Judicial Review vs Judicial Activism

Maine dono hi concept ko padha hai, lekin dono mein kya fark hai exactly? Judicial Review vs Judicial Activism? Toh koi please explain kare kya hai yeh difference? Maine ye question 3 baar padha aur abhi bhi samajh nahi aaya 😭. Abhi to yeh lagta hai ki yeh ek jagah se do hi cheezeen hain. Judicial Review to sabne padha hai ki yeh court ke pass power hai apne decisions ko validate ya invalidate karn ki, lekin Judicial Activism mein kya hai? Koi kya samjhane ki koshish kare!