Read the following paragraph from the Introduction (paragraphs 1-4].
Volcanoes are openings where lava,
small rocks and steam erupt onto
the Earth's surface. The volcano that
erupted most recently is a shield
volcano. This means it is built out of
lava, or melted rock. Lava comes up
from beneath the Earth and out of a volcano. Then it flows on the
surface.
What does the author mean by "surface"?

A. The top layer
B. The area below
C. The middle part
D. The part deep within

Isobars are lines of constant or equal pressure on a weather map. they can be used to find areas of low or high pressure over a broad area, and they can tell us how intense the system may be. on weather maps, you may have noticed areas that have a large l or h over a region with lines circling around them. the l stands for low pressure and h stands for high pressure. the lines circling them are isobars. check out the pressure system and isobars over georgia and florida. what is the present weather in this area ? a) clear and sunny b) cold and cloudy c) changing weather d) lots of precipitation

Two waves maximally constructively interfere at a point in space. among the options below, select the possible value of their phase difference at that point in space.a. zerob. πc. π/2d. not determinable by the information provided

What is the moment of inertia i of this assembly about the axis through which it is pivoted? express the moment of inertia in terms of mr