East africa and the basin and the range province of the united states are examples of a
a. subduction zone.
b. continental rift.
c. transform plate boundary.
d. passive continental margin.

Eastern African is an example of Continental rift , and Basin and Province of united states are an example of Subduction zone.

Explanation:

As we know the basin area of the united states is bordered bt the fault scraps and common features associated with it are basins, lakes, plateaus, and valleys. In general, the basin is a result of faulting and extension of landmass in a lateral direction, as long periods of compression due to the tectonic subduction. As the pacific plates mos westwards similarly the plate margins also move. The volcanism in the basin is a  product of the interaction of the plates the concerned due to he underthrust from above. Eastern African rift began to develop as a rift valley from the onset of Miocene, as a result of the active volcanoes which is called the tri-junction. The eruption of continental basalts in Ethiopian, Somali and eastern Africa occurred as a result of magnetism at the center of the rift.  This zone is home to several active volcanoes and earthquakes from Mount Kilimanjaro to the central highlands of Tanzania.

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.

D.