Let's analyze the statement and the given arguments to determine which argument supports the statement effectively.
Statement: We should plant more trees.
Argument I: Trees help in reducing pollution.
Argument II: Trees occupy too much of the earth's space.
Now, let's examine each argument:
Conclusion: After evaluating both arguments, it is clear that Argument I is correct because it provides a substantial and beneficial reason for planting more trees. On the other hand, Argument II does not present a valid reason against tree planting.
Therefore, the correct answer is: I is true.