If there is lack of water that will reduce the amount of oxygen that the place give of and it will make everything colder because of the lack in water.
The answer is D. You are welcome.
Five major Arthropod classes
Arachnida. mites, ticks, spiders, scorpions.
Chilopoda. Centipedes.
Crustacea. (crabs, lobsters, shrimp.
Diplopoda. Millipedes.
Hexapoda. Insects.
so your answer will be mollusks