Question

what part of the atom is the arrow pointing to? neutron proton electron

Explanation:

In an atom's structure, protons have a positive charge (+), neutrons have no charge, and electrons have a negative charge (-). The arrow in the diagram points to a particle with a positive charge (as seen by the + symbol near it), so it's a proton. Neutrons have no charge, and electrons are negative and orbit the nucleus, not in the nucleus with protons/neutrons.

Answer:

B. Proton