If you didn't find any plants on another planet, where might you look to find some?\nOptions:\n- surface of earth\n- park\n- greenhouse\n- windowsill\n- ice burg
A step-by-step solution is:
surface of earth
Earth is the only living planet.

No other planet has life.

One can find all kinds of living things like plants on the surface of earth.

.

The final answer: surface of earth