Question

what did the pollen found near ötzi tell scientists?
the plant pieces explained ötzis daily activities.
the flower dust showed the cause of ötzis death.
the plant pieces explained ötzis food choices.
the flower dust showed where ötzi had lived.

Explanation:

Pollen analysis (palynology) can provide information about the environment and geographical location. The flower dust (pollen) near Ötzi would show where he had lived as different plants (and their pollen) grow in different regions. Plant pieces related to daily activities or food choices is not the main role of pollen in this context. Pollen doesn't show the cause of death.

Answer:

The flower dust showed where Ötzi had lived.