B. All Labrador retrievers love the water.
The weather forecast for the day, or rather what we can assume the
predicted forecast is due to the preparations the family are making,
will likely be a hot and sunny day, with a lot of humidity. We can
establish this due to the fact that sunscreen is being packed, combined
with the fact that Becca will need her inhaler.
“He would at once become unmanageable, and of no value to his master.”
And
“It would make him discontented and unhappy.”
A simile. A simile compares two things using the words as, like, etc.