Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: The numbat, a small Australian marsupial, requires fallen logs and dead trees for shelter and for its primary food, termites. Loss of old-growth forests containing logs and dead trees could threaten the numbat with extinction. What would be the best method to protect the numbat from extinction?
Preserve old-growth forests.