Respuesta :

Sheild volcanoes form from High -viscosity lava; Composite volcanoes form from low -viscosity lava. 

so your answers should be B. 

The study of rocks is called petrology. There are different types of rocks and these are granite, marble, igneous and etc.

The correct answer is mentioned below.

What is a volcano?

A mountain that has a hole in it that is filled with lava. Volcanoes can be active or dormant.

According to the question, Shield volcanoes form from HIGH-viscosity lava; composite volcanoes form from LOW-viscosity lava.

Hence, the correct answer is high and low.

For more information about the volcanos, refer to the link:-

https://brainly.com/question/1388366