Which sustainable food packaging technology can actively monitor product freshness and change color to indicate when food is beginning to spoil?

Sustainability and technology are transforming food packaging in remarkable ways. Smart packaging is revolutionizing how consumers interact with food products, extending shelf life, and reducing waste. This poll tests your knowledge about an innovative sustainable packaging technology that's changing how fresh foods reach consumers and helping to combat the global food waste crisis. Can you identify the correct breakthrough from among these food packaging innovations?

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Thermochromic bioplastics that respond to temperature fluctuations but cannot detect actual food decomposition
Anthocyanin-based films that react to pH changes caused by spoilage compounds, changing from blue to pink as food deteriorates
Oxygen-scavenging polymers that extend shelf life by removing oxygen but don't provide visual indicators
NFC-enabled packaging that tracks shipping data but requires smartphone scanning and doesn't detect actual food quality