Question

iii. the presidential term of office

iv. presidential succession and disability
a. methods of filling vacancies

b. order of succession

c. disability of the president

d. filling the disability gap

e. transferring power

Explanation:

The content is about presidential term, succession, and related topics like filling vacancies, order of succession, etc. These are political topics, so the subfield under Social Science is Politics.

Answer:

Politics (under Social Science)