Different races follow different modes of living.

Answer: Option A

Ways : a method, style, or manner of doing something; an optional or alternative form of action.
Standards : a level of quality or attainment.
Customs : the official department that administers and collects the duties levied by a government on imported goods.
Attitudes : a settled way of thinking or feeling about something.
Modes : a way or manner in which something occurs or is experienced, expressed, or done.

Synonym of Modes is Ways