You would use A.) Triple beam balance as it is the only option that measures mass.
B measures length, C and D measure volume.
ANSWER: B, killifish
REASONING: A secondary consumer consumes animals that eat only plants. Larvae and copepods do not fit these descriptions, because they do not eat animals. Snapper do eat animals, so do not fit the description either. Killifish eat small animals that do eat plants.
Answer:
Ectotherms warm their bodies by absorbing heat from the surrounding environment, whereas Endotherms produce heat by their metabolic activities. • Ectotherms have large variations in normal body temperatures while endotherms maintain their body temperature in a fairly constant value
Explanation:
If a star appears to be very red, it would be in the spectral class "M" since that is where it is the lowest temperature, with the slowest waves.
Answer: M
Hope this helps!