The link is wrong edit the question bro!
Answer:
c. Provoca a parada do barco. (Provoca que el bote no se mueva)
Explanation:
According to Newton's theory the fan flows air to the right and receives equal force of air to the left so here It applies Newton's first law: Inertia.
In the sail of the boat there is a force to the right mad by the air coming from the fan. The fan (attached to the boat), receives equal force to the left. The resultant is null, so the fan does not change the movement of the boat.
I personally can't teach you, but I can give you advice on learning Spanish:
- Sign up for a Spanish course at school or outside of school
- Go to a Spanish-speaking country as an exchange student
- Trying learning with the help of Spanish-teaching textbook and workbooks
Good luck!