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Yes! Finally someone else who knows how...
Oh come on! Such a strong start but then you fell on your face. Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It never lets up. It's more about reproduction than staying alive. Natural selection is happening every time someone reproduces more than someone else.
Natural selection isn’t the only thing at play though. That solely refers to the organism best adapted to the environment being more likely to survive and produce offspring. Essentially everyone in our population survives to be able to produce offspring.
Sexual selection plays a much bigger part now. That isn’t someone being the most adapted to the environment, it’s someone being the most attractive to a mate. There are plenty of adaptations across nature that are maladaptive to survival, but are selected for regardless.
Then there are random mutations and genetic drift. Those happen in every population. That is more just a matter of chance.
We have found ways to adapt to our environment outside of evolution. So we no longer have a significant natural selection process.
Sexual selection is a subcategory of natural selection