What term describes the actions we must take and tasks we must do?

The term that best describes the actions we must take and tasks we must do is "responsibilities." Responsibilities encompass the various roles or expectations placed upon individuals that require them to perform specific tasks or act in certain ways. This can include personal responsibilities, like caring for oneself and one's family, as well as professional responsibilities, like meeting work-related deadlines and fulfilling job duties.

While duties, obligations, and accountabilities are related concepts, they each carry distinct connotations. Duties often refer to tasks that are expected within a particular role or position, while obligations are moral or legal requirements to act in a certain way. Accountabilities highlight the aspect of being answerable or responsible for the outcomes of actions. In contrast, responsibilities imply a broader range of expected actions and tasks that one is obliged to fulfill, making it the most fitting term in this context.