Final answer:
The 1/2 kneeling DB row is a variation of the Bench Straddle DB Row. Both target back muscles but have different body positions. The Bench Straddle involves one hand on a bench, while the 1/2 kneeling version is performed in a half-kneeling position with one hand on the bench for support. ((option b)
Step-by-step explanation:
The exercise that is a variation of the Bench Straddle DB Row is the 1/2 kneeling DB row. Both exercises involve unilateral rowing movements that target the back muscles, specifically the latissimus dorsi, rhomboids, and trapezius. The Bench Straddle DB Row is performed with one hand on a bench for support while straddling it with legs on each side, whereas in the 1/2 kneeling DB row, you're in a half-kneeling position on the ground with one knee up and the other knee down, usually supporting yourself with one hand on a bench.
The Cat Cow exercise is a yoga movement focusing on spinal flexibility rather than a rowing movement. The Seated DB Row involves sitting on a bench and pulling the weights towards your waist, and the Bent-over Barbell Row is performed by bending at the waist and pulling a barbell towards your torso, thus working the back muscles with both arms simultaneously, unlike the unilateral movement of the 1/2 kneeling DB row and Bench Straddle DB Row.
Hence, the answer is option b