What impact does reforestation have on the environment?
negative - reforestation provides a sustainable plan to use a renewable resource.
positive - reforestation provides a sustainable plan to use a renewable resource
negative - reforestation provides a sustainable plan to use a nonrenewable resource
positive - reforestation provides a sustainable plan to use a nonrenewable resource

positive - reforestation provides a sustainable plan to use a renewable resource

(Please let me know if the answer is incorrect so I can edit it :) )

sheep is a herbivore animal whereas grasshopper belongs to the class chordates but both of them feed on greens.  

if grasshopper and sheep feeding on a pasture land, i do not think both of them will have any impact on each other. however, the number of the species can make difference. since sheep feed on greens, there is a possibility there left no pasture land for the grasshoppers or they may get extinct.

yes

no

blue is scattered more than other colors because it travels as shorter, smaller waves. this is why we see a blue sky most of the time.