Answer:
The correct answer is: Option a.
Step-by-step explanation:
The context of the question, in its literal meaning, is referring to a sunny and windy day ("Está soleado y hace viento"). So, in this environment people who live in lakes or in the coast, find it as a good weather for sail boat riding ("Pasear en bote de vela"), as the option a considers.
Rather than playing in the snow ("Jugar en la nieve"), for in a sunny day normally there is no snowing, and therefore people do not go out to play in the snow.