Viviparity is considered to be more evolved because

Options

A. the young ones are left on their own
B. the young ones are protected by a thicks shell
C. The young ones are protected inside the mother's body and are looked after they are born leading to more chances of survival
D. the embryo takes a long time to develop

Explanation

### Step-by-Step Text Solution:

1. **Definition of Viviparity**: Viviparity is a reproductive strategy where the young develop inside the mother's body and are born live, rather than hatching from eggs.

2. **Protection Before Birth**: In viviparous organisms, the embryos are protected within the mother's body during their development. This internal gestation provides a safe environment, shielding the developing young from external threats such as predators and environmental hazards.

3. **Parental Care After Birth**: After birth, the young are often cared for by the parents. This care can include feeding, protection, and teaching survival skills, which further enhances the chances of the young's survival.

4. **Increased Survival Rates**: The combination of protection during development and parental care after birth significantly increases the survival rates of the young. This is because the young are less vulnerable to predation and have better access to resources necessary for growth and development.

5. **Evolutionary Advantage**: The increased survival rates associated with viviparity provide an evolutionary advantage. Organisms that exhibit viviparity are more likely to have their offspring survive to reproductive age, thus passing on their genes to the next generation.

6. **Conclusion**: Therefore, viviparity is considered to be a more evolved reproductive strategy because it enhances the survival of the offspring through both prenatal and postnatal parental care.