What organisms use carbon dioxide to survive

Plants and plant-like organisms are one example of a type of organism that needs carbon dioxide to survive. CO2 is a reactant in the photosynthesis process. Without carbon dioxide, plants would not gain enough energy to survive. 

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A) 4 amusingb)alpha particle is a helium nucleus. it contains 2 protons and 2 neutrons.c)alpha particle has charge of +2.

Sorry  i don't understand can you rephrase that