How do pheromones affect organisms?

Pheromones are indeed chemicals that play a crucial role in influencing the behavior of other organisms, primarily within the same species. They are often used for communication, helping individuals to convey various signals such as warnings, mating readiness, territory marking, or alarms. For instance, many insects release pheromones to attract mates or to signal to others when a food source has been found. This chemical communication is vital for survival and reproduction, allowing organisms to interact effectively with each other within their environment. By understanding pheromones, we can gain insights into the behavior and ecology of various species, which is why this option captures the essence of how pheromones function in the natural world.