text: sun,kya tumhe pata hai ki kuch websites par login karte waqt tumhe 'recaptcha' kyun dikhai deta hai, kya yeh sach mein zaroori hai?haan, yeh bots se bachne ke liye hota hai, isse ensure hota hai ki sirf human users hi login kar rahe hain, yeh website ki security ke liye kaafi important hai!