Question

1. how does natural selection help a population survive when the environment changes?

Explanation:

Natural selection is a key concept in Biology (a subfield of Natural Science). When the environment changes, within a population, there is genetic variation (different traits among individuals). Individuals with traits that are advantageous in the new environment (e.g., better camouflage, more efficient food - gathering) are more likely to survive and reproduce. Over time, these favorable traits become more common in the population as the individuals with less favorable traits are less likely to pass on their genes. This process allows the population to adapt to the changed environment and increase its chances of survival.

Answer:

Natural selection helps a population survive environmental changes by favoring individuals with heritable traits advantageous in the new environment. These individuals survive, reproduce, and pass on favorable traits, leading to the population's adaptation to the changed environment over time.