In solidity, for a contract to be able to receive ether, it should have eiterh a payable function, fallback payable function, or receive payable function.
Ether can be sent forcefully to a contract that doesn't have any of the mentioned functions using selfdestruct.
sefldestruct does not trigger a Smart Contract’s fallback function, it removes the contract from the blockchain and sends the remaining balance to a payable address that is passed as parametere.