The smallest type of internal boundary in the united states is a(n) boundary. a.countyb. cityc. intracityd. state select the best answer from the choices provided. abcd

The correct answer is C. Intracity

Explanation:

A boundary refers to an imaginary line that limits a specific place, this can be linked to geography, for example, a river that separates two places or can be the result of historical processes, as some borders are created based on colonization of the territories, conflicts, agreements, etc. Additionally, boundaries are classified as internal if they are under the national level, in the U.S. this includes state boundaries, counties, municipalities, cities and intracity. Moreover, from these, intracity is the smallest type of boundary because they limit areas within cities and therefore are much more specific than cities divided into intracities while states and counties divided into multiple cities.

the glands which are associated with each description is given below:

the tricuspid valve is present between right atrium and right ventricle