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.

The investiture controversy began as a power struggle between pope gregory vii (1072–85) and henry iv, holy roman emperor (1056–1106).[2] a brief but significant struggle over investiture also occurred between henry i of england and pope paschal ii in the years 1103 to 1107, and the issue played a minor role in the struggles between church and state in france, as well.by undercutting the imperial power established by the salian emperors, the controversy led to nearly 50 years of civil war in germany, and the triumph of the great dukes and abbots. imperial power was finally re-established under the hohenstaufen dynasty. historian norman cantor:

Ca mega city if i’m not mistaken