India has the largest deaf population in the world, with an estimated 18 million deaf people.

American Sign Language (ASL) is the most widely used sign language in the world, with an estimated 250,000 to 500,000 users.

All of the above statements are true. Sign languages are used by deaf people, while gestures are used by hearing people. Sign languages have a formal grammar, while gestures do not. Sign languages are used to communicate ideas, while gestures are used to express emotions.

All of the above statements are true. Facial expressions and body language are used in sign languages to convey emotions, emphasize words and phrases, and indicate the speaker's attitude towards the topic.

All of the above statements are true. Deaf people face communication barriers, educational barriers, employment barriers, and social barriers in a hearing world.

All of the above statements are true. Deaf people can overcome the challenges they face by learning sign language, using assistive technology, and advocating for their rights.

All of the above statements are true. Sign language interpreters provide communication access for deaf people in various settings, help deaf people to understand spoken language, and help hearing people to understand sign language.

All of the above statements are true. Hearing people can support the deaf community by learning sign language, using clear and concise language when speaking to deaf people, and being patient and understanding when communicating with deaf people.

All of the above statements are true. Sign languages are becoming more widely recognized and accepted, sign language technology is improving, and more people are learning sign language.

All of the above statements are true. The best way to learn sign language is to take a sign language class, use online resources, and practice with deaf people.

All of the above statements are true. Learning sign language can help you to communicate with deaf people, learn about deaf culture, and develop your cognitive skills.

All of the above statements are true. A sign language interpreter translates spoken language into sign language, a transliterator translates sign language into spoken language, a sign language interpreter works in a variety of settings, while a transliterator typically works in educational settings.

All of the above statements are true. Sign language is the primary language of instruction for deaf students, it is used to support deaf students in learning academic content, and it is used to promote social and emotional development in deaf students.

All of the above statements are true. The deaf community faces communication barriers, educational barriers, employment barriers, and social barriers.

All of the above statements are true. The deaf community is working to overcome these challenges by advocating for their rights, educating the public about deaf culture, and developing new technologies to improve communication and access.