How Venus getting closer to the sun?

Answer 1

The Sun might be pulling the Venus' Orbit. Venus walks to its orbit until it enter the Sun, or because the Sun is dying.

But how the Sun will die?

1. Sun expands. It expand and expand until it became a Red Giant

2. Earth is inside the Sun. (If I say Earth is inside the sun, The Mercury, Venus and Earth is inside)

3. (For easier to understand for others) The Sun explodes\collapses because it cannot expand anymore

4. Becomes a White Dwarf