Which of the following was not a modern (after 1920) modification to boston’s environment?
a.
interstate highway traffic was rerouted under the city
b.
the “big dig” took place.
c.
part of boston harbor was filled in to create land for the construction of logan airport.
d.
mill pond and back bay were filled in.

I think A. But not sure.

It's lithogenous i believe of course i looked it up.

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.