Voici plusieurs phrases. Choisissez la phrase objective.
- La nouvelle passe à la télé à 21h
- Les bananes vertes ont meilleur goût
- Les vêtements étaient beaux
That something is objective means that it is about the object, i.e., something everyone can see.
Ice cream can be white with red strawberry sprinkles. It is completely objective because everyone can see it. No one will claim that it is green with lemon sprinkles. Nor is there anyone who will say, "No, it's not ice cream, it's a car." So it is pretty objectively an ice cream, it is white, and it has red strawberry sprinkles.
Whether I like to eat ice cream or not, that's my subjective opinion, because it's about me.