Explanation:

• The 5.5-meter (18-foot) tall plant called "ECONARIO” was built in a year using recycled steel by the ecological artist Thijs Biersteker .
• This robotic plant can tangibly demonstrate how the actions of humans will impact the threatened species of the world.
• The robotic plant moves like a small fragile seedling, growing, not with the help of nutrients, but driven by changes over time in the Biodiversity Intactness Index (BII) – a metric developed by the Natural History Museum as a measure of how much of a region’s natural biodiversity still persists.
• The Biodiversity Intactness Index (BII) sends its data to the plant which includes the original number of species' estimated percentage that still exist as well as their abundance in a particular area, despite the environmental impact of human actions.
• The complex environmental debates that take place at a UN summit are not always easily decoded for humans to understand how it is going to impact the nature they are surrounded with, at a time when humanity is clinching its last hope to save Mother Earth. Hence, to easily understand the impact of human actions on nature, an artist and scientist came together to create a data-driven and large robotic plant that grows or withers depending upon the policy commitments made by the countries.
• Hence option (c) is the correct answer.