What is the ingredient of toilet cleaner? Md. Saifur Rahman Nuclear fusion is the process by which multiple nuclei join together to form a heavier nucleus and it is accompanied by the release or absorption of energy depending on the masses of the nuclei involved. You may likeDo I need car insurance?What is car insurance?How could I get cheaper car insurance?What is auto insurance?Why Adulterant food is the barrier to sound health?What are the producers?What are food preservatives?What is food chain?What is tertiary consumer?