Which one among the following is a correct attribute of bio-insecticide?

Q: 56 (SCRA/2011)

question_subject:

Science

question_exam:

SCRA

stats:

0,284,217,346,75,18,62

keywords:

{'pest': [0, 0, 0, 1], 'correct attribute': [0, 0, 0, 1], 'environment': [2, 0, 0, 3]}