Q: Answer this question: who hit the first home run at riverfront stadium??
A: On June 30, 1970, the Reds hosted the Atlanta Braves in their grand opening, with Hank Aaron hitting the first ever home run at Riverfront.

Q: Answer this question: what is bracketing in photography?
A: In photography , bracketing is the general technique of taking several shots of the same subject using different camera settings.

Q: Answer this question: what are add ons?
A: Browser extension , which modifies the interface and/or behavior of web browsers

Q: Answer this question: What are the busiest airports in the world?
A:
The definition of the world's busiest airport has been specified by the Airports Council International in Geneva, Switzerland.