Why was the union interested in blocking and capturing the port of galveston? a.the union wanted to harm the southern economy by upsetting the cotton trade. b.the union planned to use the city as a base to launch attacks on houston, a larger city. c.galveston was home to many texans who supported the northern cause d.galveston has many factories that developed weapons used by confederate troop.

A :) 

D. galveston has many factories that developed weapons used by confederate troop.

Explanation:

The Galveston was home of the Texans and was established issues of the proclamation of the congress of the Mexico, and is the least port that is located in the west of the new Orleans. It was mainly was used for the exports of the cotton and however the industrialization could not occur as many industries were interested in the machinery and after the city was under martial law in 1921, factories developed weapons for the confederate troops.

Explanation:

Historical source (also known as historical material or historical data) is original source that contain important historical information. These sources are something that inform us about history at the most basic level,[1] and these sources used as clues in order to study history

Historical sources include documents, artifacts, archaeological sites, features. oral transmissions, stone inscriptions, paintings, recorded sounds, images (photographs, motion picture), and oral history. Even ancient relics and ruins, broadly speaking, are historical sources.[2]