Final Answer:
Acarines are the same as mites or ticks, corresponding to option 2.
Step-by-step explanation:
Acarines collectively refer to the group of arachnids that includes mites and ticks. These small arthropods are characterized by a distinct body structure, typically featuring a fused cephalothorax and abdomen. Unlike insects, acarines do not have antennae, and their bodies often have specialized adaptations for parasitism or predation. Mites and ticks, both belonging to the Acari subclass, encompass a diverse range of species that can be parasitic, free-living, or beneficial in various ecosystems. Acarines play essential roles in ecological systems and can impact human and animal health, depending on their ecological niche and feeding habits.
Option 2 is the answer, correctly identifying acarines as the group encompassing mites and ticks.