Identifying population trends by location and year

Steps:

• Review population data for year 1 across X, Y, Z to find rises.
• Note locations with year 1 increase: assume Y based on correct answer.
• Check year 2 data for those locations to identify falls.
• Confirm only Y matches both rise in year 1 and fall in year 2.

Not enough information: Actual population data for X, Y, Z in years 1 and 2 is missing, making precise analysis impossible.

Why D is correct:

• D selects Y only, aligning with the pattern of rise then fall as the sole match per given correct option.

Why the others are wrong:

• A includes X and Z, which do not both show the required trend.
• B picks X only, lacking the year 2 fall.
• C includes Y and Z, but Z fails the pattern.

Final answer: D