Questions & Answers about Eu vou caminhar na praia amanhã.
Both verbs can mean “to walk,” but there’s a nuance:
• caminhar focuses on the act of walking itself (often as exercise or a stroll).
• andar is more general (“to go,” “to ride,” or “to walk”), and can imply movement by any means or simply “spending time” somewhere (e.g. andar na rua can mean “hanging out on the street”).
na is a contraction of em + a.
• em means “in” or “on.”
• a is the feminine definite article “the.”
Since praia is feminine, em + a praia combines to na praia, meaning “on the beach.”