Final answer:
Eckholm attributes deforestation to economic development and population growth, similar to the factors outlined in Guthman's Theory of Himalayan Degradation.
Step-by-step explanation:
Erik P. Eckholm attributes deforestation primarily to economic development and population growth. These factors lead to an increased need for resources such as land for agriculture and wood for fuel, which contributes to the degradation of forests. In Guthman's description of the Theory of Himalayan Degradation, similar influences are evident, including soil erosion and deforestation resulting from exploitation of forests for timber and the necessity for local populations to collect fuel-wood and fodder. Both accounts recognize the strain placed on forests by economic activities and demographic pressures, aligning with option (a).