Nadvertisement on the radio warning the public against the dangers of smoking is called a c. public service announcement

Because it’s an advertisement, it’s labeled under an announcement, and because it will be let out and into the ears of the public, it’s labeled a Public Service Announcement because it benefits the immediate public

They might be white heads, basically pimples but you should ask your parents to check them out before it’s something bad.

Dialect is probably part of the answer