What factors affect the rate of a chemical reaction and how?

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction.  Physical state of the reactants and surface area.Temperature.  Presence of a catalyst.

Explanation:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction.Physical state of the reactants and surface area.Temperature. Presence of a catalyst.

- "the acute form of diverticulitis can manifest itself with one or more severe attacks of infection and inflammation.

the inflammation of diverticulitis can eventually result in a bowel obstruction, which may cause constipation, thin stools, diarrhea, abdominal swelling or bloating, and abdominal pain."