Thank you for doing your homework, Lina!

Here are some corrections:

I will chose 'Carbonated Water'
Because It is good for skin.
>>I will choose carbonated water because it is good for our skin.

And if I make it cold, there are no soda.
>>And, if I make it cold, there will be no soda.

So I can feel it is water.
>>So, I will feel like it's just water.

These reason, I will chose carbonated water.
>>These are the reasons why I choose carbonated water.