The answer is commensalism.
Commensalism is a relationship between two
species in which only one of them has benefit, and the other one is not
affected.
In this relationship, frogs benefit from this relationship. They get water and shelter from the Bromeliad. The Bromeliad <span>does not gain or lose anything in the relationship, so it is not affected anyway. Thus, the relationship between frogs and the Bromeliad is an example of commensalism.</span>
Urbanization creates its own forms of water stress via increasing per capita water consumption and rising incomes, as wealthier people use more water, energy, and water-intensive goods.
Explanation:
As populations are the smallest unit that actually evolves, it is reasonable to call them the "unit of evolution"
