This igneous rock contains flattened pieces of pumice and small crystals of quartz and feldspar. what type of eruption probably formed this rock?

There are various types of igneous rocks from phaneritic and pegmatite to coarsely crystalline. The welded texture is best described as volcanic ash and pumice, when still hot it can be compacted by overlying materials, becoming a hard rock. This would mean that volcanic eruptions would be most likely to form this rock.

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.