The table shows the production (in tons) of three crops in four regions. Which region produces the most wheat? 
West
- Step 1: Identify wheat production. North: 500, South: 400, East: 450, West: 600.
- Step 2: Compare values. West: 600, North: 500, East: 450, South: 400. West has the highest wheat production.
- Step 3: Verify with options. West matches option (4).
- Step 4: Final conclusion. Option (4) West is the correct answer.





For any natural number $k$, let $a_k = 3^k$. The smallest natural number $m$ for which \[ (a_1)^1 \times (a_2)^2 \times \dots \times (a_{20})^{20} \;<\; a_{21} \times a_{22} \times \dots \times a_{20+m} \] is: