I need help with explanation

The correct answer is E, fostering. The word fostering has two meanings. 1. Looking after someone else's child - raising them, long-term 2. Encouraging the development of something Hopefully you can see why the two definitions are related. In bringing up a child, you encourage their development. This question is using the word in the second sense. Our cleanliness has *promoted,* or *facilitated,* an increase in allergies. None of the other answers make sense. We're not *extracting* (taking away), or *fulfilling* (completing), or *unifying* (joining together), or *ensuring* (guaranteeing) allergies.

* **A. Extracting** is incorrect because *extracting* means removing something from a larger whole. This does not fit the context of the sentence, which is about the increase in allergic disorders. * **B. Fulfilling** is incorrect because *fulfilling* refers to meeting a need or satisfying a requirement, which is unrelated to the idea of contributing to allergic disorders. * **C. Unifying** is incorrect because *unifying* typically means "bringing together harmoniously." While it could technically be used, it would change the meaning of the sentence from "causing allergic disorders" to "making them uniform," which does not align with the intended context. * **D. Ensuring** is incorrect because *ensuring* implies a guarantee or certainty. Using this word would suggest that all children exposed to sanitized surroundings will develop allergic disorders, contradicting the phrase "which have doubled in the last decade." * **E. Fostering** is correct because *fostering* means encouraging or promoting something, which aligns perfectly with the idea that sanitized surroundings are contributing to the rise in allergic disorders among children.

The answer is fostering. Fostering in this situation means to make a occurrence possible. They are saying that overly sanitized lifestyles may be making possible an increase in childhood allergies.

thank you all