New zealand's natural geography supplies its people with what three sources of income? natural gas petroleum opals timber tourism

New Zealand definitely has some natural gas and pertroleum supplies and it provides around 1/3 of what its people need, but not all of it. But I would choose it as two  of the three sources of income that the question is asking for!

The other one would be Turism.

New Zealand could be a source of timber, but they don't sell it for environmental reasons.