Final answer:
When taking an axillary temperature, the nurse should ensure the thermometer is placed in the center of the axilla.
Step-by-step explanation:
When taking an axillary temperature, the nurse should ensure the thermometer is placed in the center of the axilla. Axillary temperature is measured using a thermometer placed in the armpit. This method is often used for infants and young children. It is important to position the thermometer correctly in the axilla to get an accurate reading.