A pine tree had organs that carry out specific functions needed for survival. what function
do the tress leaves carry out?

Food production by Photosynthesis

Explanation:

The leaves of trees helps to trap sun light during the day by the help of the green coloured pigment named chlorophyll present in its tissues. Coupled with atmospheric carbon dioxide and water, food molecules (usually glucose) are synthesized by leaves of trees, before being transported to other part of the tree where they may be stored.

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.