Many temperate plant taxa have not adapted to tropical environments, and many animal species shifted their ranges during the pleistocene rather than adapt to climate change.
these observations are consistent with:

a) community convergence.
b) phylogenetic niche conservatism.
c) phylogenetic signal.
d) physiological tolerance.
e) local adaptation.

Phylogenetic niche conservatism.

Explanation:

Principally, phylogenetic niche conservatism is the tendency of species to retain the ancestral traits to conserve their evolutionary identity. So, it is really difficult for temperate plant species to adapt the tropical environments. Likewise, animal species during the Pleistocene epoch (2.58 million years ago - 0.012 million years ago) also exhibited resistance to adapt the climate change. Instead, they shifted their ranges for better survival.

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