Please answer the following question: You are presented with the question "What breaks up into two lighter elements when an animal divides into two parts?" and the following answer choices: - the blood cells - the heart - Energy. - the main element - heat energy - light energy - the nucleus - sensory neurons Now knowing that fission takes place when an animal divides into two parts and if the nucleus breaks up into lighter elements, it is called fission , choose the best answer.
Answer:
the nucleus