How is the function of the male urethra similar to the female urethra?

The right option is; d. They can occur anywhere from thousands to billions of years

Long-term environmental changes are environmental changes that occur gradually over time and affects organisms over generations. Long-term environmental changes can occur anywhere and it allows organisms to adapt to its effect. Examples of long-term environmental changes include global warming, deforestation, sun’s intensity, earth’s orbit and urbanization.