The Government of India refers to the absolute poverty line in terms of household consumption. This means that the poverty line is determined based on the amount of goods and services consumed by a household.

Option 1: Household savings refers to the amount of money that a household sets aside for future use. This is not directly related to measuring poverty and does not determine the poverty line.

Option 3: Household investment refers to the allocation of funds towards assets or activities that are expected to generate income or appreciate in value, such as buying stocks or starting a business. This is not directly related to measuring poverty and does not determine the poverty line.

Option 4: Household income refers to the total amount of money earned by all members of a household. While income is an important factor in measuring poverty, it is not the sole indicator used by the Government of India to determine the poverty line.

In summary, the correct answer is option 2: household consumption, as this is the measure that the Government of India uses to determine the absolute poverty line.