Can an arched back be treated with yoga?

Yoga is helpful. Yoga is great exercise and keeps the body flexible and in tune. We are meant to have arches in our back and neck so straightening it seems counter intuitive...Your arch may not need to be treated at all but yoga is beneficial no matter what.
21 reasons 2 do yoga. #3 Fend off weight gain. According to researchers, middle-aged adults who practice yoga regularly gain less weight as they age tha do those who don't practice. Ref: AARP, 5/2017.
Yoga Back Poses: . Bharadvaja's Twist (Bharadvajasana I), Big Toe Pose (Padangusthasana), Bridge Pose (Setu Bandha Sarvangasana), Cat Pose (Marjaryasana), Chair Pose (Utkatasana), Cobra Pose (Bhujangasana), Cow Pose (Bitilasana) & Crane (Crow) Pose (Bakasana). REF:http://www.yogajournal.com/poses/anatomy/back. Do you have abnormal curvature of your spine or just poor posture?