The answer to your question should be a and c hope this helps
It’s painful because when they sing, a chemical is released called melting into the victim. That venom quickly triggers the receptors of pain, and thus causing the burning sensation. Another reason is because the stinger on a bee is barbed and when it sinks into the skin, it detaches from the bee and stays into the skin of the victim.
The ridge produces magma at a steady rate so when the poles change and the crystals switch in the rock it changes to opposite of the old rock.
