Step 1: Understand the question.
We need the country that signed a 2026 MoU with India on forests, wildlife, biodiversity and climate change.
Step 2: Identify it.
India and Nepal signed this Memorandum of Understanding.
Step 3: Why Nepal.
India and Nepal share an open border and ecosystems like the Terai Arc Landscape, a corridor for tigers, elephants and rhinos. So joint forest and wildlife management is natural.
Step 4: Rule out others.
France works with India on solar power, and Argentina on farming. But this direct cross-border forest and wildlife MoU was with Nepal.
Step 5: Conclude.
The country is Nepal.
Answer: Nepal