The powers not delegated to the united states by the constitution, nor prohibited by it to the states, are reserved to the states respectively, or to the people.4
which anti-federalist concern does this amendment include in the bill of rights most clearly address?

Anti-federalism does not advocates Constitution and only supports state governments.

Explanation:

This amendment enforces the central government while equally delegating power to the individual state governments.

In the presence of only state legislation, neighbouring states might end up having issues with each other.

In the absence of state governments, the central government practising democracy might lead to loss of the rights and freedom of individual states, and hence its people.

This bill thus defines rights for the Americans and limits government’s intervention in their life.

sorry i do not know this

freedom of speech is also protected by the 1 amendment.

explanation:

here is pretty much what the 1st amendment says:

congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.