Answer:
Petrochemicals
Step-by-step explanation:
The city of Houston, Texas shares a border with Mexico. The city is known as a major exporter of petrochemicals to Mexico. The city also has deep water seaports which help in the transport of heavy petrochemicals through shipping vessels to other countries such as Brazil, Canada etc.
The facts above validates The Houston Ship Channel as allowing the city of Houston to become a center for the processing and transportation of petrochemicals.