manushyasya AtmA

किं स्विद् आदित्यम् उन्नयति
के तस्य अभितश्वराः
कश्च एन अस्तं नयति
कस्मिन् च प्रतितिष्ठति (1 - 4)

kim svid Adityam unnayati?
ke tasya abhitashvarAH?
kasca ena astam nayati?
kasmin ca pratitishThati?

The questions posed by yaksha are typically four at a time that are generally related or connected in meaning to each other. 

The first four questions ask about AdityA.

1. What makes AdityA rise?

2. Who accompany AdityA (in AdityA's journey)?

3. By what is AdityA's setting happen?

4. On what is AdityA established?

आदित्या (AdityA) most commonly represents the Sun, which is the life-giving force of the solar system where we live. Technically AdityA means the son of aditi. Aditi, 

Sources

• Yaksha Prashna Discourse by Bannanje Govindacharya

• Yaksha Prashnam Discourse by Dushyanth Sridhar

• Yaksha Prashna by K Balasubramania Iyer (Neelakantha commentary)