What type of intelligence includes monitoring adversary’s non-communication emitters?

The choice of Electronics Intelligence (ELINT) is correct because this type of intelligence specifically involves the collection and analysis of data from non-communication electronic signals emitted by adversaries. ELINT focuses on identifying, locating, and exploiting these signals to gather valuable information about an enemy's radar, missile, and other electronic systems. This information can be crucial for understanding an adversary's capabilities, intentions, and tactics.

In contrast, Communications Intelligence (COMINT) pertains to the interception and analysis of communications made by adversaries, which typically includes signals used for communication purposes like phone calls or radio transmissions. Human Intelligence (HUMINT) involves gathering information through interpersonal relationships, such as informants or espionage, which is different from the technical nature of ELINT. Imagery Intelligence (IMINT) entails the use of satellite or aerial imagery to gather information about physical objects or activities, which does not cover the monitoring of non-communication electronic emissions.

Understanding these distinctions highlights how various intelligence types complement one another in providing comprehensive situational awareness and support for military operations.