The answer would be A) Intensity. Because, You are pushing your body to get in all the training it needs in a short amount of time by intensifying the workout.
Post the story or passage so i cant help you please
1) matematicas y ciencas
2) una mochila y pluma
3) reunión
4) doce de la tarde
5) guitarra
1. Mandas
2. Deseo
3. Maneja
4. Despiertan
5. Vendes
6. Compra
7. Escucha
8. Vive
9. Pelean