The hoyt and burgess models of land use both assume that a. growth expands in zones along railroads and highways b. perishable items are grown closest to the city center c. the wealthy live in the outermost ring d. the central business district is the epicenter

The correct answer is D. Both models assume that the Central Business District is the epicenter. The models based it on the idea that land value are highest in a town's center or the city center since at this point competition is high. High-rise and high-density infrastructures are found at this area.

It is the second answer

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.