In the diagram, which angle is part of a linear pair and part of a vertical pair?

a .anglebfc
b. anglecfg
c. anglegfd
d. angleefa

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.

Physical systems is the answer

Sonar is an application of the doppler effect used by submarines.  this test was on k12.

Their neck becomes more flexible allowing for a better view of vision. legs become stronger for running