Trading the ability to do one thing for the ability to do another is called A. Adaptation
B. Camouflage
C. Metamorphosis
D. Fitness Cost

Scientists call this trade-off a fitness cost, or trading one ability for another that impacts the probability of successfully reproducing that allows the living thing to survive and reproduce. Mollie doesn't get very sick, but the cost was losing the ability to swim well.

Explanation:

A

Explanation:

An adaptation is any heritable trait that helps an organism, such as a plant or animal, survive and reproduce in its environment

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sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.