Final answer:
One study reduced millipede invasion into a structure by utilizing biological control tools, which are effective in controlling insect populations and insect resistance.
Step-by-step explanation:
One study reduced millipede invasion into a structure by utilizing biological control tools. These tools are effective in controlling insect populations and insect resistance, protecting surroundings, and lowering costs. For example, millipedes themselves can control the harmful growth of destructive fungi and bacteria.