What relies on carbon for stucture in a polymer

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

In the diagram below, the northern hemisphere would be in what season at position a a. fall b. winter c. summer d. spring

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing