Final answer:
By analyzing the statements, it is determined that the number representing 'blue' in the given code language is '1' since this is the common number associated with the word 'blue' in the provided statements.
The correct option (1)
Step-by-step explanation:
To determine the code for 'blue' in a certain code language, we analyze the given statements: 481 means 'Sky is blue', 246 means 'sea is deep', and 698 means 'sea looks blue'.
By comparing these statements, we should look for the common number in the statements containing the word 'blue'.
The statements 'Sky is blue' and 'sea looks blue' have the words 'blue' in common.
The numbers in these statements are 481 and 698, respectively. The common number in both statements is '1', which appears in the first statement and not in the other two. Therefore, the code number for 'blue' is 1.