Which of the following expresses the ratio "two to five"?

The ratio "two to five" is represented numerically by the relationship of 2 to 5. This means that for every two units of one quantity, there are five units of another quantity. When written as a ratio, it is expressed as 2:5. This format indicates the first part of the ratio (two) comes before the second part (five), maintaining the order that describes the relationship accurately.

In contrast, other options such as 5:2 would imply five units of one quantity to two units of another, which is not what is asked in the question. Similarly, 1:2 and 3:5 do not reflect the original ratio and thus do not convey the same meaning. Therefore, 2:5 is the clear and correct representation of the ratio "two to five."