1)astronomers think the most galaxies are centered by, 2)which exerts that binds the galaxy together

1
a. black hole
b. nebula
c. large planet
d. massive star

2
a. gravitational pull
b. centripetal force
c. magnetic pull
d. centrifugal force

1. 1black hole, 2gravitational

2.Black holes trap all light.

3.the center of the Milky Way

4.Its mass is greater than 20 times the mass of the sun, It is dying

5.interactions with light

6.A massive star depletes its nuclear fuel; gravity overpowers the star; supernova occurs; core of star collapses.

7. 1gravity, 2an explosion

8.These galaxies include irregular, spiral, and elliptical types.

Explanation:

i just got the test results and if you dont think its 100% thats ok you can take the test and see for your self

it creates acid rain

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.