Answer:
In Spanish, "por" is a versatile word that can be used in a variety of ways, including:
1. Expressing duration or an amount of time:
"Estuve en la playa por tres horas" - "I was at the beach for three hours."
2. Indicating the reason, motive, or cause of an action:
"Lo hice por ti" - "I did it for you."
3. Denoting movement through, by, or along a place:
"Voy por el parque para llegar a mi casa" - "I'm going through the park to get to my house."
4. Representing an exchange or substitution:
"Cambié mi camisa por tu chaqueta" - "I exchanged my shirt for your jacket."
5. Introducing the object of an action:
"Gracias por la invitación" - "Thanks for the invitation."
6. Indicating the means of accomplishing an action:
"Ella ganó la carrera por su determinación" - "She won the race through her determination."
Overall, "por" is a highly versatile preposition in Spanish that can be used in many different contexts to convey a variety of meanings.