After the Big Bang happened, the universe is constantly expanding. The Universe has expanded for around 13.7 billion years. The further a galaxy is, the faster it would move away from Earth. This principle is called the conservation of momentum.
I believe the correct answer from the choices listed above is option A. When a system is in dynamic equilibrium, the input of the system is equal to <span>the output of the system. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
It's defined as moderate and patients typically seek medical attention due to the symptoms they're experiencing.
