The correct answer for the term `Survival of the fittest` being coined is option 1, Darwin. Charles Darwin, the renowned naturalist, introduced the concept of `Survival of the fittest` in his book "On the Origin of Species" published in 1859. This concept is a key component of Darwin`s theory of natural selection, which explains how species evolve and adapt to their environment over time. According to Darwin, individuals with traits that enhance their survival and reproductive success are more likely to pass on their genes to the next generation, leading to the gradual evolution of new species. Lamarck (option 2), Mendel (option 3), and Weismann (option 4) are significant figures in the field of biology but are not credited with coining the term `Survival of the fittest.`