An inverted pyramid of number and an inverted pyramid of biomass are respectively seen in 

Concept: The number of individuals at every trophic level in Pyramid of number. It is inverted in tree ecosystem. In this, the first trophic level contains least number of trees. The insects feed on primary producer to occupy second trophic level. The number of insects is higher than first trophic level. The maximum number of individuals are found at the top trophic level.

The total mass at each trophic level is shown in the pyramid of biomass. The pyramid of biomass is inverted for sea ecosystem. The first trophic level consists of minimum biomass followed by second trophic level and then followed by third trophic level. The trophic level at the top contains maximum biomass.

Thus, the correct answer is 'Tree and Sea ecosystem.'

Hence, the correct answer is option C.