To solve this problem, we need to determine the type of ecological pyramid based on the given data.$\newline$Let's analyze the data:$\newline \bullet$Secondary consumer: 120 g$\newline \bullet$Primary consumer: 60 g$\newline \bullet$Primary producer: 10 g$\newline$In an ecological pyramid of biomass, the mass of organisms at each trophic level is represented.$\newline$Here, the biomass decreases as we move from secondary consumers to primary producers.$\newline$This indicates an inverted pyramid of biomass, where the higher trophic levels have more biomass than the lower ones.$\newline$Therefore, the correct answer is Option 3: Inverted pyramid of biomass.