Step 1: Understand the given symbols and relationships.
From the directions provided, we interpret the symbols as:
- \( K - R \) means K is the father of R.
- \( S \times R \) means S is the husband of R.
Step 2: Analyze the relationships.
- \( K - R \): K is the father of R.
- \( S \times R \): S is the husband of R.
Since \( K \) is the father of \( R \) and \( S \) is the husband of \( R \), this means \( S \) is married to \( R \), and \( K \) is \( R \)'s father.
Now, the question asks for the relation between \( K \) and \( S \). Given that \( S \) is married to \( R \) and \( K \) is \( R \)'s father, the most logical relationship between \( K \) and \( S \) is that \( K \) is the father-in-law of \( S \), which means \( K \) is related to \( S \) as father-in-law.
Thus, the correct answer is \( K*S \), which signifies the relationship between \( K \) and \( S \) as father-in-law and son-in-law.
Final Answer:
\[
\boxed{K*S}
\]