[Q] Marine biomes are found in large bodies of what?
Options:
- (A) fresh water
- (B) the environment
- (C) salt water
- (D) liquid
- (E) river water
- (F) Absorb light
- (G) Sediment
- (H) black water
[A] Here's my solution: Marine biomes are found in the salt water of the ocean. An ocean is a large body of salt water. Marine biomes are found in large bodies of salt water. The answer is (C).

[Q] What harms the respiratory and circulatory systems?
Options:
- (A) Greenhouse gasses
- (B) burning coal
- (C) inoculation
- (D) incinerated mercury
- (E) fossil fuels
- (F) water vapor
- (G) Sulfur dioxide
- (H) air
[A] Here's my solution: Air pollution harms the respiratory and circulatory systems. Incinerated mercury pollutes the air. Incinerated mercury harms the respiratory and circulatory systems. The answer is (D).

[Q] What grow in width and length.?
Options:
- (A) crocodiles
- (B) sedimentary rocks
- (C) vegetation
- (D) remains of prehistoric life
- (E) swamp vegetation
- (F) shrub beds
- (G) underground systems
- (H) loose dirt
[A] Here's my solution: Roots grow in length and width from primary and secondary meristem. Kids see the underground root systems of trees and then an aerial view of plants in the city. Underground systems grow in width and length. The answer is (G).

[Q] Biodiversity increases the what of islands?
Options:
- (A) water source
- (B) stability
- (C) Plants growth
- (D) our planet
- (E) luminescence
- (F) environment
- (G) human population
- (H) allow growth
[A]
Here's my solution: Biodiversity increases the productivity and stability of ecosystems. Islands are delicately balanced ecosystems. Biodiversity increases the stability and productivity of islands. The answer is (B).