What must the grasses be able to do to survive?
a the grasses must be able to outcompete cacti and yucca plants for shelter from
storms.
b the grasses must be able to outcompete cacti and yucca plants for minerals in
mountain rocks.
c the grasses must be able to outcompete cacti and yucca plants for shade.
d the grasses must be able to outcompete cacti and yucca plants for water.
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