Which IoT technology has been most widely adopted by conservation organizations to track endangered large mammals in African wildlife reserves?

The Internet of Things (IoT) has revolutionized wildlife conservation efforts worldwide. Advanced tracking devices, environmental sensors, and real-time monitoring systems now help protect endangered species and their habitats in ways previously unimaginable. Test your knowledge about how cutting-edge IoT technology is being deployed to safeguard our planet's precious wildlife.

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GPS collars with satellite connectivity and solar-powered batteries
Drone-based RFID chip readers that scan animals from above
Subdermal temperature sensors with Bluetooth connectivity
Acoustic monitoring devices that identify animals by their vocalizations