What is an effect of 'allaying' someone’s fears?

Allaying someone's fears refers to the act of reducing or alleviating their concerns or anxieties. When you allay fears, you are providing reassurance or a sense of security, which directly corresponds with the idea of calming someone down. This process can involve providing information, offering support, or simply being present, all of which contribute to making an individual feel more at ease.

The other options do not fit this definition. Increasing anxiety, creating confusion, or provoking anger would only exacerbate fears rather than diminish them. Thus, the association of allaying someone's fears directly aligns with the concept of calming them down.