What are some facts about shield volcanos?

A shield volcano is a type of volcano usually built almost entirely of fluid lava flows. They are named for their low profile, resembling a warrior's shield lying on the ground. This is caused by the highly fluid lava they erupt, which travels farther than lava erupted from stratovolcanoes

Shield Volcanoes -

-is the third type of volcano.

-built almost entirely of fluid lava flows.

-they are built up slowly by the accretion of thousands of highly fluid lava flows known as basalt lava that spread widely over great distances, and then cool as thin dipping sheets.

-known as one of the largest volcanoes in the world.

-lava plateaus like basalt lava can be seen in southeastern Washington, Iceland, southern Idaho, and eastern Oregon.

The correct answer is a)  a resource with a limited supply; it will run out.

The answer to the first one is barometer.