Which one of the following facts abouts animals is incorrect?

Options

A. Snakes are deaf and do not have legs
B. Whale and dolphins locate their food through echo
C. Frog and toad live only in water
D. Reptiles can crawl

Answer

To determine which statement about animals is incorrect, let's analyze each option provided:

1. **Snakes are deaf and do not have legs**: This statement is correct. Snakes do not have eardrums, which means they are unable to hear in the same way that humans do, and they do not have legs. Instead, they move using their scales.

2. **Whales and dolphins locate their food through echo**: This statement is also correct. Whales and dolphins use echolocation to find their food. They produce sounds (like tongue clicks) that bounce off objects, allowing them to determine the size, direction, and distance of their prey.

3. **Frogs and toads live only in water**: This statement is incorrect. Frogs and toads are amphibians that can live both in water and on land, particularly in moist environments. They do not exclusively live in water.

4. **Reptiles can crawl**: This statement is correct. Reptiles, such as snakes, lizards, and turtles, are known for their ability to crawl.

Based on this analysis, the incorrect statement is: **"Frogs and toads live only in water."**

### Step-by-Step Solution:
1. **Evaluate the first statement**: Snakes are deaf and do not have legs. This is true.
2. **Evaluate the second statement**: Whales and dolphins locate their food through echo. This is also true.
3. **Evaluate the third statement**: Frogs and toads live only in water. This is false; they can live on land as well.
4. **Evaluate the fourth statement**: Reptiles can crawl. This is true.
5. **Identify the incorrect statement**: The incorrect fact is that frogs and toads live only in water.