Explanation:

- Death by Poisoning: The prosecution must prove that poisoning was the cause of death. This involves scientific evidence and expert testimony confirming poison as the cause.

- Opportunity to Administer Poison: The prosecution needs to show that the accused had an opportunity to administer the poison to the victim. This could involve examining the timeline, presence, and actions of the accused around the time of the incident.

- Possession of Poison: Evidence that the accused had the poison in their possession can strengthen the case. This might require proof that the accused bought, stored, or had access to the poison.

- Correct Answer: All of these. Each element supports demonstrating guilt in a poisoning case.

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