Answer:
it is "In natural selection, the selection "pressure” comes from the environment; in artificial selection the “pressure” comes from humans."
Step-by-step explanation:
We know that natural selection is when the weakest basically get sick and killed, and the strongest stay. here is the definition of natural selection: "the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution."
we also know that artificial selection (selective breeding) is when humans take, for example, the juiciest, reddest tomatoes, and breed those to create juicy red tomatoes. the exact definition of artificial selection is: "Selective breeding/artificial selection is the process by which humans use animal breeding and plant breeding to selectively develop particular phenotypic traits by choosing which typically animal or plant males and females will sexually reproduce and have offspring together."
so based on the explanation, we know that natural selection is because of the organisms' environment and that artificial selection is because of humans. I hope this helped you! :]