Answer:
A. The magma cooled too quickly too quickly for gas to escape.
Explanation:
Scoria is a type of extrusive igneous rock. Some of their characteristics include that they cool quickly with no time for large crystals to form, some of them have large vesicles which are holes caused by gas bubbles when the lava was molten.
Answer:
roundworms,tapeworms,and flatworm
Explanation:
cuz they cannot multiply in human body
Occurs naturally on earth
Answer:
Oxygen.
Explanation:
Aerobic respiration occurs in the presence of oxygen.