Final answer:
The toppings on the BBQ chicken flatbread include grilled chicken, BBQ sauce, red onions, cilantro, and mozzarella cheese.
Step-by-step explanation:
The toppings that come on top of the BBQ chicken flatbread are:
a) Grilled chicken: It is the main ingredient, as it provides the protein in the dish.
BBQ sauce: It adds a smoky and tangy flavor to the flatbread.
Red onions: They provide a sharp and slightly sweet taste to complement the other flavors.
Cilantro: It adds freshness and a hint of citrus to enhance the overall taste.
Mozzarella cheese: It melts to create a creamy and gooey texture on top of the flatbread.