India's high poverty can be attributed to multiple factors, including a lack of basic services such as clean water and sanitation, a lack of capital investment, and unequal access to education and healthcare. While all the given responses can contribute to poverty in different ways, one of the more significant immediate factors is the lack of basic services, which directly impacts health and livelihoods. Therefore, the most relevant response would be:
There is a lack of basic services, such as clean water.