What is most likely causing the grass to disappear

what causing a grass to disapper is that in poor places the grass turn dry that the trees tap the sun so then grass has black spots then it drys and drys so it turns all black and brown

answer:

I'd love to help, but there isn't anything to choose from.

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.

this is math not biology xd