Hey, good to see you again. Population studies use sampling methods to estimate characteristics of a whole population by studying a smaller, representative group. Common methods include: Random sampling: Every individual has an equal chance of being selected. Stratified sampling: The population is divided into subgroups (strata), and random samples are taken from each stratum. Systematic sampling: Individuals are selected at regular intervals from a list. Convenience sampling: Individuals are selected based on ease of access. Several factors affect population size and dynamics: Birth rate: The number of new individuals born into the population. Death rate: The number of individuals dying in the population. Immigration: Individuals entering the population from elsewhere. Emigration: Individuals leaving the population to go elsewhere. Resource availability: Limited food, water, shelter, or space can restrict population growth. Predation: The presence of predators can decrease prey population size. Disease: Outbreaks can cause rapid population decline. Environmental changes: Factors like climate change, pollution, or natural disasters can impact survival and reproduction. Send me the next one 📸