The primary function of a neuron is to receive messages from the senses and then respond with motor activity such as a finger being burnt and thpe arm muscle pulling the finger out of harms's way. So safety is part of it. Another function is to use sensory neurons to evaluate a scientific understanding of the world, such as determining which mineral is being looked at ie by its' colour, hardness, crystal system etc.
Broken up rock that got eroded
The answer is true light is one of the forms of electromagnetic energy.
Muscles,tendons,ligaments,and cartilage
