Question

according to the survival of the fittest theory, why would a lion be less fit in antarctica? because it doesnt like water because it is not designed to live in cold areas because it cannot survive without sunlight

Explanation:

The survival of the fittest theory implies that organisms best adapted to their environment survive. Lions evolved in warmer habitats. Antarctica is extremely cold. A lion's physical traits (like a coat not thick enough for extreme cold) and behavioral adaptations (hunting in savannas, not icy terrains) make it ill - suited. Disliking water (many lions can swim) or sunlight dependence (not the main cold - adaptation issue) are less relevant.

Answer:

because it is not designed to live in cold areas