Respuesta :
Answer:
a. between individual galaxies within galaxy clusters
Explanation:
- Galaxies are moving far away firm each other, as the pace itself moving as the universe has no center and galaxies can spread and expand to infinity and thus has a direct connection with the speeds of the distant galaxies and their distances with Earth.
- Due to the presence of dark energy or dark matter, the universe continues to expand, and thus increase of the distance of the galaxies is taking place called cosmic inflation.
The fact that the universe is expanding means that the space is growing on all size scales even planets are expanding with time.
When scientists make the claim that the universe is expanding, what they are trying to say is that the universe has continued to grow right from its start.
In other words they are trying to say that there is no center of the universe. That is everything that is contained in space is moving away from every other thing.
The energy from the big bang is said to be the reason why everything is expanding.
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