The correct option is (D) They further harm the health of some bees
Beekeepers’ attempts to fight mite infestations with commercially produced insecticides have the harm that they further harm the health of bees.
Pesticides designed to kill, hurt, repel, or mitigate one or more insect species are known as insecticides. Different methods of action are used by insecticides. Some insecticides cause nervous system disruption, while others may harm their exoskeletons, repel them, or exert other forms of control.
The majority of fungicides, herbicides, and miticides are generally not very hazardous to honey bees and can be used around them without causing them any major harm. Bee toxicity to Bacillus thuringiensis, a biological insecticide, is extremely low.
According to the author, beekeepers that use commercially available insecticides to combat mite illnesses risk "further weakening" already "immunocompromised" or "nutritionally deficient" bees (lines 31-35).
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