Question

please now the picture is clear​

Answer 1

Answer:

which subject

Explanation:

this question related

Answer 2

Answer:

general knowledge about dog:

A dog whistle is a whistle (or galton's whistle) is a type of whistle that emits sound in a ultrasonic range,which people cannot hear but some other animals can hear,including dogs and domestic cats, and is used in thier training.It was invented in 1876 by Francis galton and is mentioned in his book inquiries into human faculty and it's development, in which the describe experiment to test.