What happens in a nuclear fusion reaction?
a. the nucleus of a larger atom splits into two nuclei of relatively similar size, which then lose their electrons and become anions.
b. the nucleus of a single heavy atom splits into two or more smaller nuclei that have relatively similar mass.
c. the nucleus of a heavy atom combines with the nucleus of a smaller atom, forming an atom with a larger nucleus.
d. the nuclei of two atoms with smaller mass combine to form a single atom with one larger nucleus.

C.

Explanation: During a nuclear fusion reaction, it  gets squeeze together so tightly that four hydrogen nuclei combine to form one helium atom. This is called nuclear fusion. In the process some of the mass of the hydrogen atoms is converted into energy in the form of light. The same process occurs in thermonuclear (fusion) bombs.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

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