Answer:
Leave the consonant and add an -es.
Explanation:
En el verano me gusta ir a nadar. Una de mis aficiones es construir castillos de arena. En el invierno me gusta ir a esquiar. El esquí es mi pasatiempo favorito!
In the summer I like to go swimming. One of my hobbies is building sand castles. In the winter I like to go skiing. Skiing is my favorite hobby.
The order is a,c,b,d! hope this helps
