The closest meaning to the word, biomass as it is used in the passage is that of B. matter that comes from Living things.
What is biomass?
Biomass refers to materials that are produced by living things such as animals and plants. They include things like wood, plant and animal waste, and pulp from trees.
The text is trying to say that the prairie plants are able to survive because most of their features and the matter they produce are underground. This means that they aren't affected by the harsh weather of the prairie and so can survive longer than other plants.
It is worthy of note that biomass is not only useful to plants like prairie plants, but to other organisms as well. Humans for instance use biomass for fuel which is why biomass is often called biofuel. This fuel can be used to produce electricity and even heat.
In conclusion, the closest meaning to the word biomass as used in the passage is B. matter that comes from Living things.
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