**Solution:** A population is a group of creatures belonging to the same species that live in a specific geographical area at a specified time and work together as a unit. The population of humans, for example, is made up of all humans living in a specific location at a specified moment.

Listed below are the attributes that a population exhibit:

- Natality or Birth rate

It can be calculated using the ratio of live births to the population in a certain area. The birth rate is defined as the number of people added to the population divided by the number of people in the population.

- Mortality or Death rate

It is the ratio of a region’s death rate to its population. The death rate can be calculated by dividing the number of people who have died by the total number of people in the population.

- Age distribution

It can be calculated using the percentage of people of various ages in a population. A population is made up of persons who are present at any one time and are of various ages. An age pyramid is commonly used to represent the age distribution pattern.