Answer:
A. The nucleus can be either positively charged or neutral.
Explanation:
The nucleus of an atom contains protons and neutrons only. Whereas electrons revolve around the nucleus. Protons are positively charged, neutrons have no charge and electrons are negatively charged.
your answer will be B . becasue light can be transformed into heat .
Medium stars become dwarf stars, large stars become either neutron (pulsar) stars or black holes
