In the evolutionary sense, which organism has the highest fitness?

Explanation

In evolutionary terms, fitness is defined by an organism's ability to pass on its genes to the next generation, not by traits like speed, strength, or longevity alone. While being fast, strong, or long-lived can help an organism survive and reproduce, these traits only contribute to fitness if they lead to producing more viable offspring. Therefore, the organism with the highest evolutionary fitness is the one that leaves the most offspring that survive and are capable of reproducing themselves, ensuring the continuation of its genetic material in the population.