The function of ribosomal RNA (rRNA) is

Its responsible for the process known as translation, or the process our cells use to make proteins.They are also responsible for reading the order of Amino acids and linking them together.

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The correct answer for this question is that a statement that can be proven by observation or measurement is known as a fact. The other possible answers here simply refer to idea that different individuals can place value on, but that are not necessarily known to be true.