In our solar system, the sun is our closest star and it’s huge. Around 1 million earths can fit inside the sun to show you that perspective.
The sun glows so brightly because of nuclear fusion. Nuclear fission is a certain type of reaction and it releases enormous amounts of energy. Very small particles of mass create thermal energy.
I Think The answer is b I hope it helps
<span>Quadriceps spindle is the receptor.
The patellar reflex is also called a knee-j erk reflex. In a knee-j erk reflex arc the sensory neuron directly connects to the motor neuron in the spinal cord. This is called a simple reflex arc. from the spindle to where it connects with the motor neuron in the spinal cord.</span>
Mitocondria, the power house of a cell.