Question

Darby finds a rock in her backyard. It has large crystals. She has found _____.

-an extrusive igneous rock
-an intrusive igneous rock
-basalt
-obsidian

Answer 1

The right answer for the question that is being asked and shown above is that: "-an extrusive igneous rock." Darby finds a rock in her backyard. It has large crystals. She has found -an extrusive igneous rock

Answer 2

Darby has found  an extrusive igneous rock   in her backyard.

... Lucky her.