Answer:
A. Nitrogen Fixation
Step-by-step explanation:
The process of pulling apart an N₂ (nitrogen gas) molecule involves breaking the strong covalent bond that holds the two nitrogen atoms together. This process typically requires a substantial amount of energy, as the nitrogen molecule is very stable due to the triple bond between the two nitrogen atoms. To break this bond and separate the nitrogen atoms, external energy, such as heat or the input of high-energy particles, is required. This process is often associated with chemical reactions like combustion or nitrogen fixation, where the nitrogen molecule is transformed into other compounds, allowing it to participate in various biological and chemical processes.