Iwould rather play chess than backgammon because it is more challenging correct or incorrect.
2. i enjoy jogging every day because in this way i get regular exercise correct or incorrect.

Both sentences can be deemed as "correct"

Chess is more challenging because it involves absolutely zero luck and is all about skills, while backgammon features far less possible options for a game. The other sentence features jogging everyday as an exercise and it is indeed regular exercise if done every day.

B