Logic of a solution: *Arthropods are the largest phylum of invertebrates. Insects are the largest group of arthropods. Insects belong to the largest phylum of invertibrates.*
*(F)*
The original question: *What animals belong to the largest phylum of invertibrates?
Options:
- (A) plants
- (B) parasites
- (C) octopuses
- (D) tortoises
- (E) eartworms
- (F) insects
- (G) mammals
- (H) animals*

Logic of a solution: *Temperature falls from lower to higher altitudes. Heat and temperature are the same. Heat falls from lower to higher altitudes.*
*(D)*
The original question: *The measurement of what falls from lower to higher altitudes?
Options:
- (A) snow
- (B) rain
- (C) Energy
- (D) heat
- (E) Inches
- (F) meters
- (G) H 2 O
- (H) motion*

Logic of a solution: *Mollusks live in most terrestrial, freshwater, and marine habitats. Mollusks in the diorama include snails and clams. Snails live in most terrestrial, freshwater and marine habitats.*
*(C)*
The original question:
*What kind of animal lives in most terrestrial, freshwater and marine habitats?
Options:
- (A) animals
- (B) swimming
- (C) snails
- (D) tortoises
- (E) barnacles
- (F) swea
- (G) protected
- (H) a fish*