Final answer:
The big problem at the ashram in 1915 was a food shortage, influenced by the British colonial practices and the shift towards cash crop agriculture, leading to strained food supplies and contributing to famine conditions in India.
Step-by-step explanation:
The big problem at the ashram in 1915 was B) Food shortage. This was a time when India was under British rule, and there were significant changes in agriculture due to the introduction of cash crops rather than food crops, which strained India's food supply. Additionally, during this period, India faced a number of famines that were exacerbated by issues like droughts, population growth, and colonial policies that disrupted local food systems.