Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Process | Main energy source for process |
| --- | --- |
| lightning | electricity |
| lunar cycle | gravity |
| water cycle | sunlight |
Question:
To which natural process is sunlight the main energy source? Select the correct choice to answer the question or fill in the blank.
Choices:
(A) Water cycle
(B) Lunar Cycle
(C) Lightning
(D) Matter Cycle
Answer:
(A) Water cycle