In a hypothetical tree ecosystem with only two trophic levels, a large number of insects are feeding on a big tree. Select the correct inference that can be drawn from the above information. 

Number of producers (tree) is only one. Number of primary consumers (insects) is many. The pyramid of numbers is inverted. The pyramid of biomass is upright because the biomass of the single tree is greater than that of the large number of insects feed on that tree. The pyramid of energy is always upright.