B: surrendering personal rights.
Shells evolved from ribs. ... Turtles and other shelled creatures use shells like shields to protect themselves from predators, or animals that hunt them. Turtles probably needed a shield on their backs and stomachs because they faced predators in the ocean from both above and below.
1. in and of.
2. in.
3. to.
4. of.
5. into (off could be a preposition but in this case is part of the phrasal verb 'to send off')
