Which adaptation would be most beneficial of both the taiga and marine aquatic biomes

Taiga includes a large species diversity of floura and fauna. This region is prone to extreme winter conditions. Both taiga and marine aquatic biome species adapt the adverse winter season. Plant species restrict their surface area in an attempt of protection against freezing, called hardening. Most of the animal species they hibernate so that they do not require food in harsh winters.

Answer:a thick layer of fat for insulation

Explanation:

Taiga has long cold winters so they need insulation. Marine aquatic animals like whales need the insulation when they are in cold water.