This defines money assigned for a particular use:

a.

Extradites

c.

Precedent

b.

Appropriates

d.

Doctrine

I think the correct answer from the choices listed above is option B. Appropriates defines money assigned for a particular use. The government does appropriations during budgeting sessions. This is to ensure that all their projects have sufficient amount to achieve its completion.

B. Appropriates is what defines money assigned for a particular use. To assign money to a particular use is to appropriate.