25.3.3—Why redshift leads to the idea that the universe is expanding

explain why redshift leads to the idea that the universe is expanding.

Use —why redshift leads to the idea that the universe is expanding to connect the rule to the data and decision in the question.

This matters because —why redshift leads to the idea that the universe is expanding determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply —why redshift leads to the idea that the universe is expanding to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: —Why redshift leads to the idea that the universe is expanding is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.