I would go with 'Major sandstorms destroyed the crops' because the Indus Valley civilization most likely declined by something affecting the food.
The Mongol Empire guarded roads carefully to promote trade throughout its territory.
The Islamic Golden Age ended.
Answer:
Such symptoms are associated with "allergic rhinitis"
Explanation:
Allergic rhinitis is also called hay fever and is includes symptoms such as itching of the throat, eyes, and ears, swollen eyes and even sneezing. This usually occurs when there is an overreaction by the immune system to allergens present in the air.
