Question

what are the four variables used to calculate population growth?
location, sunlight, proximity to humans, and food source
temperature, humidity, wind speed, and precipitation
births, deaths, immigration, and emigration
weather, vegetation, predators, and prey

Explanation:

Population growth is determined by the number of births (increase in population), deaths (decrease in population), immigration (individuals moving into the population), and emigration (individuals moving out of the population). These are the key demographic factors that directly affect population size changes. The other options mention environmental or ecological factors (like location, sunlight, temperature, etc.) which can influence population but are not the direct variables used in calculating population growth in demographic terms.

Answer:

births, deaths, immigration, and emigration