Step 1: Understanding the Buddhist Causal Wheel.
The Buddhist Causal Wheel describes the interdependent links that lead to suffering and rebirth:
- Trsna (craving), Nama-Rupa (name and form), and Sadayatana (six senses) are considered links that connect the present life to the cycle of birth and rebirth.
- Jara-marana (old age and death) is a link that comes at the end of the cycle, not in the present life.
Step 2: Conclusion.
The correct answer is 3. Jara-marana.
Final Answer:
\[
\boxed{\text{The correct answer is 3. Jara-marana.}}
\]