The correct matching of types of ecological energy productivity with their respective definitions is as follows: - P - Net primary productivity (ii): This refers to the amount of energy stored by autotrophs after subtracting the energy lost due to respiration. - Q - Gross primary productivity (i): This is the total amount of energy produced by autotrophs through photosynthesis. - R - Net productivity (iv): This is the energy left after energy losses, available for the next trophic level. - S - Secondary productivity (iii): This refers to the net gain of energy by consumers after energy losses due to respiration and other processes. Thus, the correct answer is ( {P - ii, Q - i, R - iv, S - iii} ), corresponding to option (C).
