The requirement to conduct a census was included in the united states constitution to

1: control the numbers of immigrants
2: determine income tax rates
3: determine the number of memebers from eachbstate in the house of representatives
4: record the birth & death rates of the population

Correct  3. Determine the number of members from each state in the House of Representatives.

Explanation:

There are 435 members  in the House of Representatives in Congress.  That number has been set at that level since 1929.  The number of representatives per state is adjusted after each census, which is conducted every 10 years.  The US Constitution (Article 1, Section 2), says:  "Representatives and direct Taxes shall be apportioned among the several States which may be included within this Union."

Additional detail:

The number of electoral votes each state has in the Electoral College (for presidential elections) is also determined by the federal census.  Electoral College votes are aligned with the size of a state's overall Congressional representation, so the number of electoral votes each state gets (of the 538 total electoral votes) is recalculated every ten years, based on the most recent US Census data.

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