Consider a simple food web consisting of plants, aphids, ants, and ladybird beetles. Aphids are herbivores that consume the plants, and ladybird beetles are a predator that eats aphids. The ants obtain nutritious honeydew from the aphids, and in return the ants protect the aphids from predatory insects. What is likely to happen to the ladybird beetles, aphids, and plants if the ants go extinct

The given food web consists of plants,aphids,ants and ladybird beetles
Aphids are herbivores which consume plants
Ladybird beetles are a predator which eats aphids
Ants obtain nutritious honeydew from the aphids and also protect the aphids from predatory insects
Mutualism exists between ants and aphids as both are benefited from each other
If ants go extinct then aphids population will soon start to diminish because aphids protected the ants and therefore now ladybird beetles will directly attack on aphids
If aphids will start to decrease then plants population will increase because if aphids will decrease then they won't be able to consume plants and hence plant population will increase
Ladybird beetles act as a predator and will also soon start to diminsh as ants number will decrease then ladybird beetles will soon die due to starvation