Question

what factors affect natural selection? select three options.
× isolation
✓ variation
✓ overpopulation
✓ adaptation
complete
natural selection leads to blank.
done ✔

Explanation:

For the first part (factors affecting natural selection), in natural selection theory, variation provides the raw material (different traits in a population), overpopulation leads to competition for resources, and adaptation is the result of favorable traits being selected. Isolation is more related to speciation mechanisms like allopatric speciation, not a direct factor of natural selection's process. For the second part, natural selection leads to evolution (specifically, the evolution of populations as favorable traits become more common over time, or sometimes more directly to adaptation refinement, but the key outcome is evolution/adaptation - but in standard terms, natural selection is a mechanism of evolution, leading to changes in allele frequencies and ultimately evolution of species/populations, or more immediately to adaptation of populations to their environment). However, if we consider the typical fill - in - the - blank here, the most common answer is "evolution" (or "adaptation" but evolution is the broader outcome). But since the first part's correct options for factors are variation, overpopulation, and adaptation (as per the checks in the image, and the cross on isolation, which is correct because isolation is not a direct factor of natural selection's operation but of speciation).

Answer:

For the first question (factors affecting natural selection):
B. variation, C. overpopulation, D. adaptation (assuming options were labeled as such, but from the image, the correct ones are variation, overpopulation, adaptation).
For the second question (Natural selection leads to): evolution (or adaptation, but evolution is the standard answer here as natural selection is a driving force of evolution, causing populations to change over time through the selection of favorable traits).