During which of these phases of life can a frog survive both on land as well as in water?

Options

A. Larva phase
B. Embryo phase
C. Tadpole phase
D. Adult frog phase

Answer

**Step-by-Step Solution:**

1. **Understanding Frog Life Stages**: Frogs undergo several life stages, including egg, larva (tadpole), and adult. Each stage has different habitats and survival capabilities.

2. **Identifying the Larva Stage**: In the larval stage (tadpole), frogs are aquatic. They have gills and a tail, which makes them adapted to living in water. They cannot survive on land during this stage.

3. **Considering the Embryo Phase**: The embryo phase occurs when the frog eggs are laid in water. This phase is also aquatic, as the embryos develop in the water and cannot survive on land.

4. **Examining the Adult Frog Stage**: As frogs mature into adult frogs, they undergo significant changes. Adult frogs have lungs for breathing air and limbs for movement on land, allowing them to live in both aquatic and terrestrial environments.

5. **Conclusion**: The only life stage during which frogs can survive both on land and in water is the adult frog stage.

**Final Answer**: Adult frog.

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