Which of the following describes the most likely change to terrestrial biomes resulting from warmer average global temperatures?
a deciduous trees found in temperate seasonal forests would flower later in the year.
b the latitude range of tropical rain forests would narrow closer to the equator.
c high-latitude biomes, such as the tundra, would experience a decrease in net primary productivity.
d. the global distribution of midlatitude biomes, such as grasslands and temperate rain forests, would increase.

D.The global distribution of midlatitude biomes, such as grasslands and temperate rain forests, would increase.

Explanation:

Several global climate changes have occurred throughout planetary evolutionary history inducing new organizations in ecosystems. Climate change is closely associated with the carbon cycle and currently the levels of greenhouse gases in the atmosphere are the highest in the last 42,000 years.

With warmer average global temperatures, some more sensitive land biomes would undergo some changes, but the global distribution of mid-latitude biomes, such as grasslands and temperate rainforests, would increase.

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i think the answer is b.