Grasshoppers are commonly eaten by mice and rats. Coyotes like to eat mice and rats. If the coyote population decreased, the mice and rat population would increase, meaning the grasshopper population would decrease.
grp 17
Explanation:
this should be the new periodic table:) grp 1 and 2 belongs to metal. grp 18 belongs to halogen which have full valence electron thus they are inert/ unreactive. thus the ans is grp 17. grp 17 are halogens which are non metals.