Type I survivorship curve:Type I survivorship curve describes a pattern where most individuals survive until old age, with high mortality rates occurring later in life.
Type III survivorship curve:Type III survivorship curve represents a pattern where there is high mortality early in life, but those who survive have a higher chance of living longer.
Mortality rate: Mortality rate refers to the number of deaths within a specific population during a given time period, usually expressed per thousand or per hundred thousand individuals.