Here is the item:
Thrashing on the surface of the lake, a huge catfish __________ Reggie's fishing pole almost to the point of breaking. Reggie fought on, images of fried fillets making his mouth water.

The blank requires the simple past of bend, an irregular verb. You chose bent, the correct form. Hallelujah!

Verb Simple
Present
Simple
Past
Past
Participle
bend bend(s) bent bent

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