Answer: The answer is (D) usually made of tough fibers
Explanation:
The sun is extraordinarily hot because it is a star. Additionally, each star has its own unique, incredibly hot processes. These reactions are referred to as thermonuclear fusion. The Sun appears to be enormous in comparison to other stars due of its proximity to us. The Sun is a star of medium size. For instance, the following is a list of some of the biggest stars in our galaxy and their distance from the Sun: Mu Cephi is approximately 1500 times the diameter of our sun. The sun's core is so heated and pressurized that nuclear fusion occurs, converting hydrogen to helium. Nuclear fusion generates energy in the form of heat and photons (light)... Solar heat and light are sufficient to illuminate Earth's days and keep our planet warm enough to support life.
I would help you but sorry I don't know the answer.
Facilitated diffusion - movement of substances across the cell membrane with the help of a carrier protein.
