This is all i know about caves: Caves are large, natural holes beneath the surface of the earth. Underground passages and caves are found in rocky landscapes across the world. They are found in areas with a lot of limestone, a common type of rock. They can be created in various ways, but most caves are hollowed out of rock by water.
The circulatory system - hemoglobin in the blood transports oxygen :)
I got Lizard for this question because lizards are living things.
Answer:
you don't have to worry about replacing them or watering them
Explanation:
