Final answer:
San Antonio, Corpus Christi, and El Paso are the three Texas cities that contain H-E-B manufacturing facilities.
Step-by-step explanation:
The three Texas cities that contain H-E-B manufacturing facilities are San Antonio, Corpus Christi, and El Paso. H-E-B is a supermarket chain in Texas, and it has several manufacturing facilities in these cities to produce their own products, such as bakery items, dairy products, and canned goods. ]
San Antonio, Corpus Christi, and El Paso all have a strong presence of H-E-B stores and manufacturing facilities.