Which aircraft model is represented by the acronym ERJ?

The acronym ERJ stands for Embraer Regional Jet, which primarily includes the aircraft models produced by Embraer designed for regional flight operations. Among the given options, the Embraer 170 and Embraer 175 specifically fall under this category, making them a fitting representation of the ERJ acronym.

The Embraer 170 is known for its capacity and efficiency, suitable for shorter regional routes, while the Embraer 175 builds on this model with larger seating capacity and range. Together, these models exemplify the characteristics of the ERJ series, such as regional operations, fuel efficiency, and advanced technology, aligning well with the expectations and needs of airlines serving regional markets.

In contrast, the other options represent different families of Embraer aircraft that do not share the ERJ designation. The Embraer 150/155, although part of Embraer's regional jet history, is not categorized as ERJ. The Embraer 190/195 belongs to a slightly larger segment of regional jets, and the Embraer 200/205 models are not commonly categorized within the ERJ series. Hence, the Embraer 170/175 is the correct choice as it directly aligns with the designation of ER