1) E

Volume increases by a lot whilst the depth increases by a little amount at either end.

A small increase in volume for a large increase in depth in the middle. Therefore, the shape would have to be wider at the top and the bottom and narrower in the middle.

A – Wrong
The shape is not narrower in the middle.

B – Wrong
The shape is actually wider in the middle. So this is definitely wrong.

C – Wrong
The shape is actually wider in the middle. So this is definitely wrong.

D – Wrong
The shape is actually wider in the middle. So this is definitely wrong.

E – Correct
The shape is wider at the top and bottom whilst narrower in the middle.

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