The diagram below shows part of a food web in an oak woodland.
spiders
carnivorous insects
blackbirds
caterpillars
aphids
slugs
oak trees
The use of insecticides in a nearby field resulted in the death of most aphids and
caterpillars.
Which tine in the table identifies the effect on the numbers of slugs and carnivorous
insects?
Number of slugs
Number of carnivorous insects
A
decreases
stays the same
B
increases
decreases
с
decreases
increases
D
increases
stays the same