Giardia duodenalis are what type of contaminant? If the hazard is a microorganism, list what kind. Group of answer choices

physical

chemical

biological

biological, bacteria

biological, parasite

biological, virus

answer188 to 210 calories;

when in a crucial situation, after calling 911, the correct posture for delivering effective compression is the proper hand placement.

first, place two fingers at the sternum, then put the heel of your other hand next to the fingers and place hand on top of the other. lock your elbows by using your body’s weight and compress the victim’s chest with a depth of 2 inches.

moreover, do 15 compression and 2 breaths, this process must be done four times until there is a pulse or a arrive.