input: Text: The forests bear the carbon Amogh Rai is standing on a small patch of wooded hillside, his Android phone held up above him, taking in the canopies of the trees that rise up around us. There's a problem though. It's a winter's day in the northern Indian foothills of the Himalayas, and the sun isn't breaking through the clouds with its usual clarity. Rai is using an app on his phone to help him understand the canopy's interception of light, but a layer of haze is preventing the 27-year-old Indian from collecting any meaningful data. Around him are some other tools of the trade: a portable device known as a ceptometer, used for measuring leaf area index; a spherical densiometer, for understanding canopy foliage and foliage covering the ground; and a laser rangefinder, which is used to estimate the height of trees but which has a tendency to malfunction. I'm six feet tall. The laser rangefinder is often convinced that I'm actually 17 metres. What is happening here may resemble a comedy of elemental errors, but it has significance far beyond the mountainous forests of Kumaon, one of two regions in the state of Uttarakhand. Rai is working with a number of other ecologists and field assistants on the pithily titled research project, Long-term Monitoring of Biomass Stocks and Forest Community Structures in Temperate Zone of Western Himalaya. Spearheaded by the non-governmental Centre for Ecology Development and Research (CEDAR) and funded by India's Department of Science and Technology, this project is about climate change. It seeks to find out how much carbon is being absorbed by the region's forests. This is achieved by taking the information collected – foliage overlay, the height of the trees, leaf area index and canopy layer, among other things – and using it to make an allometric equation. Understanding the basic mechanism of
  Question: Why did Narenda want to return to the forest from the city?
  
   (A) He wanted to be able to save money by not living in an urban environment
   (B) He was tired of the heat and wanted to live somewhere rural
   (C) Rai had asked him directly for his help
   (D) He lost his job at the Nestle factory
  Answer:
output: He was tired of the heat and wanted to live somewhere rural