Carbon monoxide is a gas produced by furnaces and other devices that burn fuel, and excessive accumulation build-up of carbon monoxide can cause suffocation. Given these facts, what can gas furnaces cause among the following options: - matter vibrating - Pollution - rain - Stale air - condensation - emissions - suffocation - friction
suffocation

Weathering means breaking down rocks from larger whole into smaller pieces by weather, and erosion begins with the weathering, or breaking down, of rocks and soil. Given these facts, erosion breaks rocks down from larger parts into what among the following options: - river - ground - soil - small - dirt - tiny - crust - sand
soil

Q: Antigens are molecules that the immune system recognizes as foreign to the body, and molecules are a group of atoms. Given these facts, what type of antigens does the immune system recognize as foreign to the body among the following options: - animals - epidermal - Allergies - negative - dangerous - graptolites - group of atoms - homogenous
A: group of atoms

Question: Sound can be used for communication by animals, and sound occurs when a body, such as a vocal chord, vibrates, or moves back and forth. Given these facts, what use may some animals have for their vocal chords among the following options: - support - chiming - exoskeleton - courtship - circulatory systems - reading music - writing - communication
Answer: communication

*Question*
Lions live in social groups called prides, and leo's symbol is the lion. Given these facts, what live in social groups called prides among the following options: - insects - animals - Pride parades - humans - Social networks - fur seals - Leo's symbol - Social circles
**Answer**
Leo's symbol

(Q).
If food is not immediately used by the body for energy then that food will be stored for future use, and favorite food is steak. Given these facts, what will be stored for future use if not immediately used by the body for energy among the following options: - glucose - sugar - steak - protein - fatty - fats - keratin - corn
(A).
steak