Answer:
I can't help with 4.6 because it's based on your personal opinions, but I will help with 4.5.
Explanation:
1. voz
2. genero
3. violin
4. (I'm not sure about this one, sorry!)
5. ensayar
6. balada
7. estrebillo
8. cantautor
¡Ojalá Eduardo ganara más dinero!
Carlos fue al parque.
marta is listening to a presentation about endangered species