The particles that are found in the nucleus of an atom are
a. neutrons and electrons
c. protons and neutrons
b. electrons only
d. protons and electrons

option c. protons and neutrons

Explanation:

Protons and Neutrons

Explanation: The nucleus is a dense structure in an atom. It consists of positively charged protons and neutrally charged neutron. This makes the nucleus a positively charged region in an atom.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.