Turn the given fact into a question by a simple rearrangement of words. This typically involves replacing some part of the given fact with a WH word. For example, replacing the subject of the provided fact with the word "what" can form a valid question. Don't be creative! You just need to rearrange the words to turn the fact into a question - easy! Don't just randomly remove a word from the given fact to form a question. Remember that your question must evaluate scientific understanding. Pick a word or a phrase in the given fact to be the correct answer, then make the rest of the question. You can also form a question without any WH words. For example, "A radio converts electricity into?"

Fact: H2O is needed for all life on Eartth.
What is needed for all life on earth?

Fact: The site of photosynthesis in plant and algae cells is found within organelles.
Organells found in the cells of plants and algae enable many things, including:?

Fact: planting maples has a positive impact on an ecosystem.

what can be planted to have a positive impact on the ecosystem?