Question

look at the roots below. which one means earth or rock? astro bio geo therm

Explanation:

• astro: It is related to stars and celestial bodies. For example, "astronomy" is the study of celestial objects.
• bio: It is associated with life. Words like "biology" (the study of life) use this root.
• geo: It means earth or rock. Words such as "geology" (the study of the earth's structure, rocks, etc.) use this root.
• therm: It is related to heat. For example, "thermometer" is an instrument to measure heat.

Answer:

geo