Which of the following represents the largest metric prefix?

In the metric prefix system, each prefix represents a power of ten, which allows for easy scaling of units. Giga, which corresponds to 10^9 or one billion, is the largest prefix among the listed options.

Hecto represents 10^2 (or 100), Kilo represents 10^3 (or 1,000), and Mega represents 10^6 (or one million). When comparing these prefixes, Giga stands out as it denotes a much larger quantity than the others, making it the largest metric prefix in this context. Understanding the hierarchy of metric prefixes helps in converting and comparing different measurements effectively in scientific contexts.