In solidity, to inherit from a contract, use is keyword:
solidity
import "./zombieattack.sol";
contract ZombieOwnership is ZombieAttack {
}It's possible to inherit from multiple contracts as follows:
solidity
import "./zombieattack.sol";
import "./zombieforces.sol";
contract ZombieOwnership is ZombieAttack, ZombieForces {
}