Final answer:
The riddle hints at a concept that is multifaceted, with the ability to be both dark and light, and to cause both joy and stress. The answer is d) A journey, which reflects life's varied experiences and the complexity of emotions one encounters over time.
Step-by-step explanation:
The riddle provided, "I am dark, I am light. I am cruel but also kind. Stressing too much might kill you. Love can cause pain. You will come across me in a few years. What am I?" prompts us to consider a concept that embodies these seemingly contradictory characteristics. The correct answer is d) A journey, as it is an abstract experience that can include moments of darkness and light, difficulty and ease, and can metaphorically 'stress' or bring joy to someone. It is something that one might encounter multiple times in life, as it can refer to literal travel or metaphorical passages like relationships, careers, or personal growth. The concept of a journey can also encompass love and pain, as these emotions are often encountered along life's path.
In relation to the texts provided, the journey can represent the experiences described within each piece, highlighting contrasts and life's intricate dance between joy and sorrow, discovery and loss, and the ceaseless quest for truth and understanding amidst the play of light and darkness.