A Cross-Contract Call occurs when a transaction or operation is executed across two separate smart contracts. This is primarily relevant in decentralized applications where interactions between different contracts are needed to achieve a specific outcome.In this process, one contract may invoke a function in another contract, enabling complex operations that rely on multiple components. For instance, a decentralized finance platform might require both a lending and a borrowing contract to interact in order for a user to take out a loan.Cross-Contract Calls can enhance functionality but also introduce complications. They can make the execution of transactions more gas-intensive and increase the risk of failure if one contract calls fail, potentially rolling back the entire operation. Proper validation and error handling are essential to ensure that all contracts function smoothly together. Overall, Cross-Contract Calls are a powerful feature that allows for more sophisticated interactions and use cases in blockchain systems.