The mass tells you the amount of matter or substance that makes up an object.
The weight tells you the measure of the matter.
The volume tells you the amount of space/size taken up
As we know that average speed is given by the ratio of total distance covered and total time of motion so we will have

now we have
distance covered = 40 meter
time taken by the bird = 10 minutes
now in order to find the average speed of the bird


so the average speed of the bird is 4 m/min
Answer:
C. Dark Matter
Explanation:
Dark matter is estimated to make up 90 percent of the mass of the galaxy.
The dark matter (as astronomers have come to call the invisible material) extends to a distance of at least 200,000 light-years from the center of the Galaxy.