Scientific name: cynara cardunculus
Globe artichokes are a type of thistle. The edible part of the artichoke is the young flowerbud. Artichokes are usually boiled in salted water until they are tender. In some countries they are deep fried.
Croak is the noise a frog or toad makes. Sometimes people say "ribbit" instead of croak. Frogs make noise by passing air through a vocal sac, but by puffing out the skin on their throats they can make their croak so loud that some types of frog can be heard up to a mile away.
Folk is a word used to describe people, often of a similar culture or social class. The folk singers in the picture celebrate their culture by wearing traditional clothing.
Scientific name: quercus robur