Evolution is the change in the heritable characteristics of biological populations over successive generations. This changeoccurs as a result of processes such as natural selection, genetic drift, mutation, and gene flow.
Natural selection is the process by which organisms with traits that are better adapted to their environment tend to survive and reproduce more than those with less favorable traits. Over time, this can lead to the accumulation of advantageous traits in a population.
Adaptations are characteristics or traits that make an organism better suited to its environment. These traits are the result of natural selection and can help the organism survive and reproduce.
Speciation is the process by which new species arise. It occurs when populations of the same species become isolated from each other and diverge over time, leading to the evolution of distinct species.