A:PersonX watches facial expressions Because PersonX wanted to study people B:PersonX is a fashion photographer. Answer: substances
A:PersonX does PersonX's utmost Before, PersonX needed to work very hard B:PersonX needed to graduate college. Answer: cooler
A:PersonX becomes sad As a result, PersonX feels depressed B:PersonX had been sad for five years. Answer: cooler
A:PersonX does PersonX's utmost Before, PersonX needed to work very hard B:PersonX is on vacation helping a friend. Answer: substances
A:PersonX drinks enough water PersonX then pours water into a cup B:PersonX is carrying a water bottle. Answer: substances
A:PersonX becomes sad As a result, PersonX feels depressed B:PersonX had been sad for thirty minutes. Answer: substances
A:PersonX keeps PersonY balance As a result, PersonX feels willful B:Person X helps his son Person Y ride the bicycle for the first time. Answer: cooler
A:PersonX drinks enough water PersonX then pours water into a cup B:PersonX is carrying their coffee mug. Answer: cooler
A:PersonX keeps PersonY balance As a result, PersonX feels willful B:Person X is tied to Person Y back to  back against his will. Answer:
substances