Choose all of the following possible causes for the ordovician-silurian extinction. select all that apply.

climatic cooling
major glaciation
global warming
sea level drop
increase in ocean ph

It is sea level drop.

Sea level drop.
Hope this helps~!
~{Isle of flightless birds}

If these are the missing choices: a. to determine skin temperature, place the back of your hand against the patient's skin.b. determine body temperature by touching the patient's hands and feet.c. skin temperature will tell you very little about this patient's condition or well-being.d. the patient's skin temperature and color will likely be warm and red.my answer is: a. to determine skin temperature, place the back of your hand against the patient's skin. using the back of the hand to check for temperature rather than the palm is more effective because the back of the hand has more nerves that can feel and transmit the temperature than the palm.