Ques:You are presented with the question "What can cause the immune system to not work properly?" and the following answer choices: - cigarettes - Malnutrition - burning coal - Healthy food - Exercise - Good health - Allergies - Pesticides Now knowing that immunodeficiency occurs when the immune system is not working properly and malnutrition , particularly with lack of protein , can cause acquired immunodeficiency, choose the best answer.

Ans:Malnutrition
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Ques:You are presented with the question "What typifies life?" and the following answer choices: - Beauty - exercise - Energy - Color - recovery - Movement - Oxygen - Energy. Now knowing that oxygen is just one substance transported by the blood and blood typifies the life, for the life is in the blood, choose the best answer.

Ans:Oxygen
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Ques:You are presented with the question "Which of the following can process the movement of charges into light and heat energy?" and the following answer choices: - Unplugged refrigerators - Firecrackers - energy - our nearest star - Melted candles - kinetic energy - Light bulbs - Burning stoves Now knowing that some light bulbs convert electricity into light and heat energy and electricity requires the movement of electrical charges, choose the best answer.

Ans:Light bulbs
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Ques:You are presented with the question "What does thick fur help a bear with?" and the following answer choices: - Helps blend in - nutrients - Helps them run fast - Protect from heat - Protect from cold - heat energy - adding heat - hard outer covering Now knowing that thick fur can be used for keeping warm and with a thick fur coat and 4 inches of fat a bear stays warm, choose the best answer.

Ans:
Protect from cold
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