B

Explanation:
Leading is the process of directing and influencing individuals or groups to achieve organizational goals, focusing on motivation and guidance. Option A, controlling others, is more about enforcing compliance, which is not the essence of leadership. Option C, ensuring activities conform to planned events, relates to the controlling function of management. Option D, setting timetables and schedules, is part of planning or organizing. Thus, B is the correct choice as it accurately describes the leadership role.