How many square varas are there in one labor?

In Texas land surveying, a labor is a traditional unit of area measurement that holds significance in the context of measuring land parcels, particularly in historical and agricultural applications. One labor is defined as equivalent to 1 million square varas.

To understand this better, it's essential to recognize what a vara is; it is a unit of measurement that is approximately equal to 33.33 inches or about 0.84 meters. Therefore, to convert labor into square varas, you conceptualize that one labor equals a one-million-square-varas area. This large number is often utilized in contexts such as land grants and determining the size of agricultural plots.

Each of the other options provided reflects significant figures that might be assumed, but in the context of Texas measurement systems, none align with the accurate conversion and widely accepted definition of a labor being one million square varas. Thus, the correct choice accurately reflects the commonly accepted measurement within the surveying profession in Texas.