Answer:
b) competition.
Step-by-step explanation:
Density-dependent factors are those that influence population growth and are related to the size or density of a population. They have a greater impact when the population is more crowded or dense. In the case of competition, as population density increases, individuals within a population compete for limited resources such as food, water, and shelter. This competition can lead to decreased survival rates, reduced reproductive success, and overall population regulation.
The other options provided (a-hurricane, c-forest fire, and d-drought) are examples of density-independent factors. Density-independent factors affect population growth regardless of population size or density. They can have a significant impact on population size but are not directly related to the number of individuals in a population.