Final answer:
The subject of this question is Biology. The woman's attempt to double the food intake of her hen led to the cessation of egg production.
Step-by-step explanation:
The subject of this question is Biology because it relates to the topic of egg production in animals, specifically in hens. The question highlights the case of a woman who wanted her hen to lay more eggs by increasing its food intake, but instead, the hen stopped laying eggs altogether.
In Biology, egg production is a complex process that is influenced by various factors, including nutrition, hormonal regulation, and reproductive cycle. The woman's attempt to increase egg production by doubling the hen's food intake may have disrupted its hormonal balance or caused metabolic issues, leading to a cessation in egg production.
It is important to note that a hen's ability to lay eggs is influenced by a multitude of factors, and simply increasing food intake may not guarantee increased egg production. Proper nutrition, environmental conditions, and overall health of the hen also play crucial roles.