B is the best answer.
I hope this helps! :)
Answer:
They release Carbon Dioxide (CO 2)
The correct answer is letter C. Throughout the history of America, land grants have not been very common. As this was a practice that governments did not approve of because of the ancestral settlers that inhabited the areas first. This was a long debate that have spun through the ages and many conflicts arose from this problem.
Groundwater<span> also can </span>cause erosion<span> under the surface. As water flows through the soil, acid is formed. ... Minerals that are carried in </span>groundwater<span> can also be </span>deposited<span> in other places. This cycle of </span>erosion and deposition<span> can </span>cause <span>underground caves to form.</span>