Question

Define observable universe​​

Answer 1

Answer:

The observable universe is a ball-shaped region of the universe comprising all matter that can be observed from Earth or its space-based telescopes and exploratory probes at the present time, because the electromagnetic radiation from these objects has had time to reach the Solar System and Earth since the beginning of ...

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Answer 2

Answer:

the process by which green plants prepare their own food is called photosynthesis