Will give brainliest

During photosynthesis, plants generate sugars which contain chemical potential energy, but plants need external energy to perform photosynthesis. Where does this external energy come from?
A.
nuclear energy in the core of the Earth

B.
nuclear reactions in the Sun

C.
chemical potential energy in other plants

D.
chemical reactions in the Sun

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.