Which of the following are examples of infrastructure?

oil refinement and health care

institutions, administration,
and education

local and national politicians

coffee, cotton, and tea crops

The examples of infrastructure from the options provided are:

- Oil refinement: It refers to the physical structures, facilities, and processes involved in refining crude oil to produce usable products such as gasoline, diesel, jet fuel, and other petroleum-based products.

- Education: It refers to the system of schools, colleges, universities, and other educational institutions, as well as the physical facilities like classrooms, libraries, and laboratories.

Therefore, the examples of infrastructure from the provided options are oil refinement and education.