The answer to that question is A
Grassland, desert, tundra, marine
<span>The leaf exerts a force on the sidewalk; the sidewalk exerts a force on the leaf.</span>
I think is D,,,,,,,,,,,,,,,,,
A. <span>A flatworm doesn't have a coelom
Flatworms and other invertebrates belong to a specific group called </span><span>acoelomate, wherein they lack a coelom and has an internal cavity which serves as their digestive cavity.</span>
