Final answer:
Texas continued to fight the Civil War after General Robert E. Lee surrendered due to slow dissemination of news, determination of Confederate soldiers, and incomplete Union occupation of Texas.
Step-by-step explanation:
After General Robert E. Lee surrendered, Texas continued to fight the Civil War for a few reasons. First, news traveled slowly, and the enslaved people in Texas were not immediately aware of their freedom. Additionally, some Confederate soldiers and leaders were determined to continue the fight even after Lee's surrender. Finally, the Union forces had not yet fully occupied Texas, so the Confederate troops still had a presence and continued to resist.