a rock or a pen or a book or a table
Answer: Option (c) is correct.
Explanation:
Average propensity to consume refers to the fraction of income that is spent on consumption. It is determined by dividing the consumption level of an individual by income.
Average propensity to consume (APC) = 
Hence, as the income of an individual increases, as a result average propensity to consume falls because the denominator part of an equation become more larger than the numerator part.
Answer: principle of least interest is the correct answer.
Explanation:
Agriculture provides employment opportunities for rural people on a large scale in underdeveloped and developing countries. It is an important source of livelihood. The rising agricultural surplus caused by increasing agricultural production and productivity tends to improve social welfare, particularly in rural areas