Can someone plz me with these 5 will give brainliest for right

1. the hertzsprung-russell diagram below shows how the brightness, surface temperature, and color of stars are related. stars would be

a. barnard’s star is less bright than the sun, has a surface temperature below 3,800 k, and is red.
b. barnard’s star is less bright than the sun, has a surface temperature above 3,800k, and is red.
c. barnard’s star is brighter than the sun, has a surface temperature below 5,300 k, and is yellow.
d. barnard’s star is brighter than the sun, has a surface temperature above 5,300 k, and is yellow.

2. the milky way galaxy is described as a disk of stars orbiting a central point on the disk. which of these best explains why people on earth cannot see the entire shape of the milky way?

a. earth is a part of this galaxy.
b. many more stars exist outside the galaxy.
c. the stars in the center of the galaxy are extremely small.
d. the center of the galaxy consists of a dense cluster of stars.

3. a student learns that the sun is classified as a medium-size star and that many stars are much bigger and brighter. however, the student observes that other stars look very dim, even through a telescope. why do other stars look much dimmer than the sun?

a. the sun appears yellow, which is more visible than other colors.
b. the sun is much closer to earth than other stars are.
c. other stars are made up of different gases than the sun is.
d. as light from other stars travels through space, it gets reflected.

4. the sun is a mid-sized, main sequence star. what stage is next in the life cycle of the sun?

a. red giant
b. black hole
c. white dwarf
d. neutron star

5. in november 2013 an object orbiting the sun seemed to disappear behind the sun. when a satellite did not detect the object, astronomers thought that the object had been destroyed when it passed close to the sun. however, when another satellite detected a small, bright object with a fan-shaped tail, astronomers proposed that the object was not destroyed. what type of object were astronomers most likely observing?
a. a comet
b. an asteroid
c. a meteor
d. a nebula