What holds combinations of atoms together in molecules? nuclear forces protons and electrons chemical bonds atomic magnetism

The right answer is chemical bonds.

The chemical bond is an attractive interaction between atoms. The origin of this attraction can be electrostatic (ionic bond, hydrogen bonding) or quantum (covalent bond, metal bond, Van der Waals bond). The goal is, each time, to minimize the energies.

The chemical bonds can be classified according to their binding energy (strong bond and weak bond).

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.

supercell thunderstorms are perhaps the most violent of all thunderstorm types, and are capable of producing damaging winds, large hail, and weak-to-violent tornadoes