What is the function of the xiphoid process?

The main function of the xiphoid process is to indirectly provide support to the lower ribs through the cartilages in the celiac plexus and act as the point of attachment for many muscles that help make the floor of the diaphragm.

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The troposphere gets warmer as altitude increases.

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