The highest percentage of Australia's forests are
A) Acacia
B) Rainforest
C) Eucalypt

Eucalypt

Explanation:

The eucalypt forest is by far the most common forest type in Australia covering 101 million hectares which is 77% of Australia's total native forest area.

an angle + its complement = 90 degrees

a mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. this uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.a geomagnetic reversal is a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.