Answer:
NK cells<em><u> perform all of these roles</u></em>
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hope this helps
-lvr
I believe the answer would be D) kitchen scraps and grass clippings
Limestone is essential for the formation of petroleum reservoirs
Limestone is great for soil as due to its structure, it can buffer acidic chemicals in soil
It is useful in the prevention of explosions from mining that are caused from too much methane release
It is useful in mediating the effects of erosion the the environment
