What are so tiny that they are measured at only a few thousand light-years or less and astronomers think that there may be billions of them in our universe?

The correct answer is STARS

Explanation:

Billions of stars are believed to be in different galaxies and a lot more billions are believed to be in our universe. These stars are small/tiny that they are a few thousand light-years away. Light-year is the unit for measuring distance of bodies in space which can be described as how far a beam of light travels in a year.

c

explanation:

i think

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion