In the carbon cycle plants us enerdy from the sun to convert blank from the air into organic material that becomes a part of the plants structure

This sentence is talking about photosynthesis, which requires the use of energy (I.e. photons) from the sun. Photosynthesis involves the breaking down of Carbon Dioxide (CO2) from the air to be incorporated into glucose molecules that can be stored in plant cells.

Hope this helps! :)

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey