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Question:

Which of the following organisms exhibits a high fitness?

A a deer that has 90% viability of all offspring.
Explaination

Fitness in biological terms refers to an organism's ability to produce viable offspring that are also able to reproduce in later generations. Organisms that have a low fitness can either be infertile or produce offspring that die before reaching reproducing age. Those organisms with a high fitness are considered to be better adapted to the environment.[Life Science]