Really, that's something that you should decide for yourself. For a start, do you LIKE physics enough, to study a lot of it? You should also check what a physics expert would work in, and whether there are sufficient job opportunities in your country. If you happen to live in the United States (or plan to live there in the future), you can check the information on the OOH (Occupational Outlook Handbook).
There is not "one major branch of physics", there are several.
Yes. Sound is a major concern in physics.
Chemistry, physics, earth science are the major braches of physical science.
grasslands
newton physics Quantum mechanics
classical physics and (Quantum or modern) Physics
physics
The two major divisions in physics are classical and modern physics. The subdivisions on the other hand are mechanics, thermodynamics, acoustics and so many more.
They should not be difficult for you. You can also look into just math as a major or take chem and physics together before you make up your mind.
I feel as if the person should do Physics instead of 4th year in foreign language. [EDIT] I'd say take the foreign language course instead because colleges like to see that you have 4 years of one foreign language. If you want to major in physics, then wait until college to start on your physics major. Until then, focus on getting into college first.
Not necessarily, however it depends on your intended major. For example, if your major is in business, then a physics would most likely not be required. If your major is in engineering, then a physics would be required. It just depends on your specific program of study at the college or university.
The two major divisions of physics are classical physics and modern physics. Classical physics deals with the study of macroscopic phenomena using principles such as Newtonian mechanics and thermodynamics. Modern physics, on the other hand, explores the behavior of matter and energy at the atomic and subatomic levels, incorporating theories like quantum mechanics and relativity.