Through analysis of ice cores, scientists learn about glacial-interglacial cycles, changing atmospheric carbon dioxide levels, and climate stability over the last 10,000 years. Many ice cores have been drilled in Antarctica.
The insects clustered around the light is an example of A response to a stimulus. The insects are attracted to the light, so the flocked towards it.
Answer:
Joint - a joint is where two bones articulate
In this case, the femur and tibia form a joint.