Rubenstein states that one benefit of individual vehicle use is perceived [lower] cost compared to
the cost of public transit. It what ways is this a “perceived” benefit?

Magma forms by partial melting of upper mantle and crust. partial melt means that only a fraction of the available material forms a melt, and that the remainder stays solid. the partial melt rises because of its lower density and ascends through he crust. this is so conclusive mean the answer would be magma igneous rocks or balistic magma.

Plz put the answer choices thx.