How is the word "term" defined when used to describe a ratio relationship? How is the word "term" defined in the context of an expression?
a) A term is a mathematical concept with no specific definition
b) A term is a constant value in a ratio; in an expression, it represents a variable or constant
c) A term is irrelevant in ratio relationships; in expressions, it signifies an error
d) A term is a variable in ratios; in expressions, it signifies an unknown value