Which of the following help in communication with the other members of the same species

Options

A. Hormones
B. Automones
C. Pheromones
D. Autocoids

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which substances help in communication between members of the same species. This implies that we are looking for a method of signaling or interaction that occurs specifically among individuals of the same species.

2. **Analyzing the Options**:
- **Hormones**: These are chemical substances produced in the body that regulate various functions. However, they primarily act within the individual organism and do not facilitate communication between different organisms.
- **Atomones**: This term does not correspond to any recognized biological substance or concept, so it can be disregarded.
- **Pheromones**: These are chemical substances released by an organism into the environment, which trigger social responses in members of the same species. They are crucial for communication, especially in insects, where they can signal alarm, attract mates, or mark territory.
- **Autocoids**: These are local hormones that have effects within the same tissue where they are produced. They do not play a significant role in communication between different organisms.

3. **Identifying the Correct Answer**: Among the options, pheromones are the only substances that specifically facilitate communication between individuals of the same species. They serve as chemical signals that can influence behavior and interactions.

4. **Conclusion**: The correct answer to the question is **pheromones**, as they are the chemical substances that allow for communication between members of the same species.