In what way did african american soldiers the union cause?

a. they served only as cooks.

b. they fought as soldiers in battles only.

c. they served only as spies.

d. they served in combat and noncombat roles.

The correct answer is C.

Explanation:

Blacks also served as spies and scouts to the Union Army, providing valuable information about Confederate forces, plans, and familiar terrain.

answer: producers

explanation:

they are producers because the use photosynthesis to collect sunlight and make food for themselves which when a animal comes around and eats it it becomes a food chain

21 balloons is the story of professor william sherman's travels.

in 1883, he set off from san francisco for a balloon ride over the pacific and was found a month later floating with 21 balloons in the atlantic ocean. this seemed an astounding feat and everyone wanted to know what had happened.    

professor sherman was loyal, however, and said he would tell his tale first to the western american explorers club in san francisco, of which he was a member. this built up suspense for several chapters before he began to tell of the wonders of his adventures and the amazing island of krakatoa, an island which had just been blown up by a volcano.  

the residents of krakatoa are all millionaires who live under a "gourmet government" of their own devising. we get to see all the incredible adventures that creative people with unlimited resources would create according to the author.