Why do people need sunshine?
Ultraviolet waves from sunlight are absorbed through the skin as part of the process of producing Vitamin D. This is a critical vitamin for the immune system's ability to ward off disease, as well as for a person's hormonal balance. So sunshine can help make people both healthier and happier. On the other hand, too much sunshine can cause sunburn, which can make a person both unhealthy and unhappy.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: Why do people need sunshine?
### Input: 
### Response: Ultraviolet waves from sunlight are absorbed through the skin as part of the process of producing Vitamin D. This is a critical vitamin for the immune system's ability to ward off disease, as well as for a person's hormonal balance. So sunshine can help make people both healthier and happier. On the other hand, too much sunshine can cause sunburn, which can make a person both unhealthy and unhappy.</s>