Be respectful and set a good example. Hope i helped.
Not enough information it says “The mom does exercise..” like okay but what about it? I can help but I need the rest to answer the unfinished question.
Answer:
A= las cascadas
Explanation:
las cascadas are waterfalls.
The sentence basically talks about someone being scared when they saw
[ blank ] of water going down the river. The only one that can make sense is waterfalls. So it is A.