The neighbors didn't invite Charlotte to the block barbecue because Charlotte's dog is often on the loose making a mess on their lawns. Not inviting her is an example of a(n)

Informal Negative Sanctions.

Explanation:

A social sanction can be defined as reaction of society,approving and disapproving someone's actions. Social sanctions can be positive and negative.

In the given case, social sanction is negative. Informal negative sanction can be defined as sanctions that are regulated to discourage, embarrass, public ridicule, criticize, etc. In the given instance, informal negative sanction is used to discourage Charlotte, by not inviting her to block barbecue because her dog creates mess on lawns when left loose.

Therefore, informal negative sanction is the correct answer.

the united states has a federal government. the president is the head of the federal government of the united states. however, each state forms its government for administration purposes. the powers of the state governments are exercised within restricted state boundaries. and citizens participate in this government by voting.