Answer:
The first net represents the flower box
Explanation:
This question doesn't involve any sort of comparison of the dimensions. If you take a look, the two figures are perfectly similar, besides the fact that the second one has an addition to one of the rectangular sides of the net.
The first figure, if you were to imagine, would form a box without a top. The second figure has that one attachment to one of the rectangular sides such that it is, in fact the top.
But this flower box doesn't have a top, provided that it is filled with flowers inside; meaning that ⇒ Answer: The first net represents the flower box