Answer:
(a) It is a platform for accelerating the transition towards food and water systems that are net-zero (carbon), nature-positive and that aims to increase farmer resilience.
Explanation:
The "100 Million Farmers" platform is an initiative aimed at transforming food and water systems to be more sustainable and resilient. The goal is to achieve net-zero carbon emissions, enhance nature-positive practices, and improve the resilience of farmers to climate change and other challenges. This aligns with the description provided in option (a).