Astep by step sequence with only one path showing the relationship between organisms that feed on each other starting with a food source such as plants is called what ?

The answer is option b.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass

Gravitational force i believe