How does antibiotic resistance primarily develop?

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Antibiotic resistance primarily develops through genetic mutations in bacteria and the improper use of antibiotics. Bacteria can undergo spontaneous mutations, which may sometimes result in a change that allows them to survive despite the presence of an antibiotic. When antibiotics are used improperly—such as when they are overprescribed, not taken for the full course, or used for viral infections—this can create an environment conducive to the survival of resistant bacteria.

When antibiotics are administered, susceptible bacteria are killed, while those that have developed resistance remain unharmed and can multiply. Over time, these resistant strains can become more prevalent, making infections harder to treat. This process can also be exacerbated by the use of antibiotics in agriculture, where livestock may be treated with antibiotics to promote growth or prevent disease, potentially leading to the spread of resistant bacteria into the human population.

The other options do not relate to the mechanisms of antibiotic resistance. Lack of exercise, a diet high in carbohydrates, and increased physical activity do not have a direct impact on the development of antibiotic resistance in bacteria.