Which of the following statements correctly defines a float in Python?

A float in Python is defined as a number that contains a decimal point or is written in exponential (scientific) notation, representing a real number. The correct option represents this definition accurately.

The value 1.2 is a floating-point number because it includes a decimal point, which allows it to represent non-integer values. This enables Python to perform precise calculations that require fractional components.

The other choices do not represent floats. The first choice is a string representation of a number because it is enclosed in quotes, which means it cannot be used in numerical calculations without conversion. The second choice, True, is a Boolean value and not a numeric type. The last choice, 12, is an integer, which is a whole number without a decimal point. Thus, only the option featuring 1.2 satisfies the criteria for a float in Python.