You are presented with the question "What do mammals breathe?" and the following answer choices: - lung - Air - O2 - Gas - Carbon dioxide - Urea - Heat - Moisture Now knowing that lungs are used for breathing air by land animals and mammals are animals with lungs, and they breath air, choose the best answer.
Air
(Question)
You are presented with the question "Green what can be accomplished through pushing on pedals?" and the following answer choices: - commuting - Plants growth - walking - driving - Heart rate - running - horse-riding - Movement Now knowing that pushing on the pedals of a bike cause that bike to move and bike commuting truly is green but bike commuting is difficult, choose the best answer.
(Answer)
commuting
Ques: You are presented with the question "What do organisms cluster around, in the ocean floor?" and the following answer choices: - cracks - chemicals - limestone - crust - headaches - Nutrients - horses - dogs Now knowing that organisms cluster around hydrothermal vents in the ocean floor and background Hot water vents form inside cracks in the ocean floor, choose the best answer.
Ans: cracks
(Q).
You are presented with the question "What does the animal that burrows to help aerate soil have?" and the following answer choices: - Energy - Five hearts - critical organs - resistance - Energy. - food and shelter - fur and fat - four limbs Now knowing that earthworm burrows help aerate soil, which is also good for plants and an earthworm has five hearts, choose the best answer.
(A).
Five hearts
Ques:You are presented with the question "What are endothermic vertebrates with legs?" and the following answer choices: - Birds - mammals - Snakes - ducks - Lizards - ants - long - toads Now knowing that birds are endothermic tetrapod vertebrates and legs define Tetrapods, choose the best answer.

Ans:Birds
Ques:You are presented with the question "Water quality can be negatively effected by what? " and the following answer choices: - flooding - Pesticides - erosion - contamination - competition - Pollution - sulfur dioxide - deforestation Now knowing that acid rain has a negative impact on water quality and sulfur dioxide causes acid rain, choose the best answer.

Ans:
sulfur dioxide