The rate of natural increase refers to the difference between the number of live births and the number of deaths occurring in a year, divided by the mid-year population of that year, multiplied by a factor (usually 1,000). It is equal to the difference between the crude birth rate and the crude death rate.
Pollination !! hope this helps
Urban areas are characterized by high population density when compared to other areas
Areas that are located on the outskirts of cities or large urban areas but retain rural characteristics such as agricultural productions are generally considered as peri urban areas