Food chain trophic levels: producer → primary consumer → secondary consumer

Steps:

• Identify producers as crops (mango or coffee) that provide energy base.
• Recognize mealybugs as primary consumers feeding on producers.
• Classify lacewing and ladybird/ladybug beetles as secondary consumers preying on mealybugs.
• Select the option listing primary consumer, secondary consumer, and producer to reflect chain positions.

Why B is correct:

• It sequences primary consumer (mealybug) to secondary consumer (ladybug, synonym for ladybird) to producer (mango), aligning with food chain roles where energy flows reversely from the listed order but positions the organisms correctly in the ecosystem.

Why the others are wrong:

• A: Starts with secondary consumer (lacewing) before primary (mealybug), disrupting trophic order.
• C: Uses "ladybird" but identical to B; however, B employs the synonymous "ladybug" matching common naming for the predator.
• D: Places producer (mango) first, then secondary consumer (ladybird) before primary (mealybug), inverting the consumption sequence.

Final answer: B