The correct option is A It is most likely the daytime.
Since Shweta is experiencing a cool breeze sitting in her house looking at the sea, the phenomenon which is occurring is sea breeze. Sea breeze occurs during the daytime. This is because, during the day, the land gets heated up faster than the sea, and the warm air above the land rises up. Because of this, the cold air from the sea rushes towards the land resulting in sea breeze.