Which MLS provides information for a significant part of Texas?

The North Texas Real Estate Information System (NTREIS) is the correct choice because it serves as a multiple listing service that covers a substantial portion of the North Texas region. This MLS is specifically designed to aggregate property listings and real estate data, making it a crucial resource for agents and brokers in that area. NTREIS includes listings from a wide array of counties and cities within Texas, facilitating comprehensive market analysis and property searches for both real estate professionals and consumers.

The other options, while they may serve significant regions, do not provide the same extensive coverage of the state as NTREIS. For instance, the Houston Area MLS primarily focuses on listings within the Houston metropolitan area, which, while important, is more localized compared to the broader reach of NTREIS. The Metropolitan Regional Information Systems, Inc. mainly operates in the Mid-Atlantic region and does not significantly cover Texas. Meanwhile, the California MLS pertains to listings in California, making it irrelevant for those interested in Texas real estate. Therefore, NTREIS stands out as the MLS with substantial relevance to a significant part of Texas.