Introduction
In the epic Ramayana, the search for Sita is a crucial part of the narrative. After Ravana abducts Sita, Ram and Lakshmana embark on a quest to find her. During this journey, they receive vital assistance from several characters.

Key Helper: Hanuman
- **Role of Hanuman**: Hanuman, the devoted monkey god, plays a pivotal role in helping Ram and Lakshmana locate Sita. His unwavering loyalty and immense strength make him an invaluable ally.
- **Search Efforts**: Hanuman leaps across the ocean to reach Lanka, where Sita is held captive. He not only finds her but also reassures her of Ram’s commitment to rescue her, showcasing his courage and devotion.

Other Characters
- **Jatayu**: While Jatayu does help Ram and Lakshmana by bravely trying to save Sita during her abduction, he is ultimately defeated by Ravana. His contribution is significant but occurs earlier in the story.
- **Sugriva**: Sugriva, the king of the monkeys, later allies with Ram and assists in the battle against Ravana. However, he does not directly aid in the initial search for Sita.
- **Ayomukhi**: Ayomukhi is not a major character in the search for Sita and does not provide assistance to Ram and Lakshmana.

Conclusion
In summary, while several characters contribute to the epic's narrative, it is Hanuman who plays the most critical role in the search for Sita, making him the correct answer to the question. His determination, bravery, and loyalty highlight the themes of friendship and devotion prevalent in the Ramayana.