Contract: The Elusive Concept

Maine socha tha I understand Contract, and then the paper happened 💀. Abhi toh main confused hoon. To sabse pehle, koi ek real life example ya definition de de jo mujhe clear kare. Maine khud padhai ki, par yeh term to bahut confusing hain. Mere book mein likha hai ki ek Contract ek agreement bani hai, par kaise? Koi examples de de jo mujhe yeh samjhaye ki kaise ek Contract banata hai. Main TS LAWCET ka paper khatra me hoon, aur bas ek real life example ki zaroorat hai. Please help!