I don’t know why they make everyone type more than 20 characters but B sounds like the most reasonable answer.
Tissue damage activates nociceptors or pain receptors in the skin. A signal is sent to the peripheral nerve to the spinal cord where neurotransmitters or chemical messengers are released. It activates other nerves to pass signal to the brain. The signals are relayed to the somatosensory cortex for sensation, frontal cortex for thinking and limbic system for emotional response.
the correct answer is the first one. density = mass / volume.
i hope this helped!
Seafood, white mean, eggs, milk/dairy, Beef