Russia's Belgorod region is under attack again from Ukraine. Why does it keep getting targeted?

Belgorod region faces escalating Ukrainian attacks amid Moscow's invasion. Putin vows a strong response, while officials reinforce defenses after a bloody escalation in Belgorod city. The area holds key iron ore reserves and major industrial companies.

source https://timesofindia.indiatimes.com/world/europe/russias-belgorod-region-is-under-attack-again-from-ukraine-why-does-it-keep-getting-targeted/articleshow/108656644.cms