A because they all have the -ing
Need more information please
1. Black troops played a major role at the Battle of the Crater during the siege of Petersburg, Virginia, and formed
2. At the beginning of the Civil War, Virginia had a black population of about 549,000. Of those African Americans.
3. Losing at Gettysburg ended Southern plans to invade the North; Winning at Vicksburg let the Union control the Mississippi River and divide the Southern States.
Answer:
monkeys, dogs, and birds all are wild but can be tame too
