Fill in the blank (_) in the following sentence from the following choices.
Sentence: We picked up surplus wood pallets for cheap. We wanted to re-purpose them as shelves or a tree house. Necessity won and we built the _ .

Choice 1: We picked up surplus wood pallets for cheap. We wanted to re-purpose them as shelves or a tree house. Necessity won and we built the tree house .
Choice 2: We picked up surplus wood pallets for cheap. We wanted to re-purpose them as shelves or a tree house. Necessity won and we built the shelves .
Which of the choices is correct? Respond with only "1" or "2" and no additional text.
2
2. The sentence should read "We picked up surplus wood pallets for cheap. We wanted to re-purpose them as shelves or