Arjuna asks Krishna whether the path of renunciation or the path of action is better for him. Krishna replies that both paths are good but that the path of karma yoga is more direct. The path of renunciation and the path of action both lead to the Self if practiced deeply.
Just so, what is karma Sanyasa yoga?
In common parlance karmasannyasa yoga, renunciation in action, is understood to be the abandonment of work in pursuit of wisdom, knowledge of the limitless and actionless self. A sannyasi, the renouncer, is supposed to give up action and dedicate his entire life to study and contemplation.