The correct answer is 'shallow.' Key Points - Let us see the meaning of Deep: - Deep: extending far down from the top or surface. - Example: The lake is deep here. Let us see the meanings of the given options: -Dark: with little or no light. - Light: having a considerable or sufficient amount of natural light; not dark. - Dangerous: able or likely to cause harm or injury. - Shallow: of little depth. - From the meanings of the given words, we can say that the word 'shallow' is the opposite of the meaning of the underlined word 'deep'. - Hence, the correct answer is'shallow.'