Why would grass-types be effective against rock-types?

Question

I have never understood how grass-types are super effective against rock types because if you threw a lump of grass at a large rock, this isn't going to damage the rock in real-life so please explain the concept?

Answer 1

Have you ever seen an old side walk? Grass begins to grow out of it, gradually ripping it apart with its expanding roots, while the sidewalk can do nothing in return. Grass is super effective against rock because plants move, erode, or crush rock as they grow.

Comments

Thanks.

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No prob

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I like this answer :P

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Yeah, its a good answer.