<prompt> Putrefaction is facilitated by following except -Very high temperatureFree airDamp environmentShallow grave  <response>: Putrefaction is arrested below 0C and above 48C as the activity of microorganism stops.Putrefaction is facilitated by free access of air, moisture and optimum temperature 10C-45C, so decomposition is fast in shallow damp, marshy graves in bodies without clothes and coffin. 