In a ____________________ attack, the attacker sends a large number of connection or information requests to disrupt a target from many locations at the same time.
In DDoS attack, the attack comes from various system to a particular one by making some internet traffic.
This attack is initiated from various compromised devices, sometimes distributed globally through a botnet. It is different from other attacks such as (DoS) Denial of Service attacks, in which it utilizes an unique Internet-connected device ( single network connection) to stream a target with the malicious traffic.
So in DDoS, multiple systems are involved in the attack and hence we can conclude that as the answer.