1. Correct Answer: Option B: 24
 2. Explanation:
     To solve this problem, we need to find the smallest perfect square greater than 1000. This is because the gardener wants the number of rows and columns to be the same, which implies a square arrangement of plants.
     1. Calculate the square root of 1000:
        \[
        \sqrt{1000} \approx 31.62
        \]
        Since the number of rows and columns must be an integer, we round up to the next whole number, which is 32.
     2. Calculate the perfect square of 32:
        \[
        32 \times 32 = 1024
        \]
     3. Determine the additional plants needed:
        The gardener currently has 1000 plants and needs 1024 plants to form a perfect square. Therefore, the number of additional plants required is:
        \[
        1024 - 1000 = 24
        \]
     Thus, the minimum number of plants the gardener needs more is 24.