How many bytes are there in one Megabyte (MB)?

One Megabyte (MB) is defined as 1,000,000 bytes. This is based on the decimal (SI) metric system where the prefix "mega" signifies a factor of one million. In computing, while a Megabyte has also been historically referenced as 1,048,576 bytes (which corresponds to 2^20, or 1024 kilobytes), the correct answer in the context of this question is the decimal value of 1,000,000 bytes, aligning with the standard definition used in data storage and transmission.

Other options represent different quantities related to data sizes; for instance, 1,000 bytes would only equate to one kilobyte, while 1,000,000,000 bytes is one gigabyte, and 1,000,000,000,000 bytes is one terabyte. Understanding these distinctions and their relationships is crucial for anyone working with data metrics.