Lava and other materials that are launched from a volcano into the air are referred to as tephra. The correct option among all the options given in the question is option "A".Tephra is actually the material that is ejected by an active
volcano irrespective of the type of the material, fragment size or emplacement
mechanism. The airborne substances of the volcanoes are known by the name
pyroclasts. The pyroclasts remain as tephra unless they become hot enough to
fuse together.
The type of global wind is: Trade winds
Glaciers deposit their sediment when they melt. They drop and leave behind whatever was once frozen in their ice. It’s usually a mixture of particles and rocks of all sizes, called glacial till. Water from the melting ice may form lakes or other water features. Moraine is sediment deposited by a glacier. A ground moraine is a thick layer of sediments left behind by a retreating glacier. An end moraine is a low ridge of sediments deposited at the end of the glacier. It marks the greatest distance the glacier advanced.
A drumlin is a long, low hill of sediments deposited by a glacier. Drumlins often occur in groups called drumlin fields. The narrow end of each drumlin points in the direction the glacier was moving when it dropped the sediments.
An esker is a winding ridge of sand deposited by a stream of meltwater. Such streams flow underneath a retreating glacier.
A kettle lake occurs where a chunk of ice was left behind in the sediments of a retreating glacier. When the ice melted, it leaves a depression. Hope this helps ;)
It might be let me think a square root is right