Answer:
"The Negro Speaks of Rivers" 1921 "The Weary Blues" 1925
Explanation:
The first two only said that poetry was the genre so sorry if that doesn't say anything. Also two memorable characters or voices were Ruby Brown appears in Ruby Brown and Alberta K. Johnson or Madam appears in Madam to You
In experimental physics, reverberation produces echo and thus makes undesirable sound. An echo is a sound reflected off of a surface. In a big hall, it interferes with the actual sound. It gives confusion when people are having a conversation.
The last sentence of the text restates all of the author's statements, because it shows how the new materials were used in the design of the spacesuit.
We can see this, because the main subject of the text is the importance of the spacesuit for astronauts, as this costume should be able to protect the astronauts and allow them to move properly to carry out the work they must do in a environment as different as outer space.
The last sentence of the text refines this information, as it shows how the layers added in the new spacesuit were used to allow astronauts to work safely and efficiently.
You can find more information about spacesuits at the link below:
brainly.com/question/18631916?referrer=searchResults