B. It helps to narrow the topic.
Freedom is a condition in which people have the opportunity to speak, act and pursue happiness without unnecessary external restrictions. Freedom is important because it leads to enhanced expressions of creativity and original thought, increased productivity, and an overall high quality of life.
Alvin is a first manned submersible vessel and this is owned by the United States. This is capable of carrying two scientists and one pilot. This is created and designed with a very little room aboard so that it could sink easily in the deep of the ocean and can be recovered easily.
