Hearing is used for sensing sound by animals, and hearing requires functioning ears. Given these facts, what are used for sensing sounds by animals among the following options: - ears - echolocation - birds - fibers - toads - the nose - Frogs. - the blood
ears

(Question)
Population density is the average number of individuals per unit of area or volume, and population crashes in high density populations are so devastating that extinction becomes probable. Given these facts, if the number of individual members of a species becomes to high in a fixed area, the species can among the following options: - massive damage - remove limbs - become extinct - competition - escape their bodies - survive - shrink - migrate
(Answer)
become extinct

Ques: Plants use cellulose for their cell walls, and most plant fibers are comprised of cellulose. Given these facts, what are fibers composed of among the following options: - lmestone - cellulose - ribosomes - animal fur - plastic - produce light - cellulite - Hemoglobin
Ans: cellulose

(Q).
The Earth revolving around the Sun causes the seasons to change on its axis, and seasons are caused because the earth's axis is tilted as the earth revolves around the sun. Given these facts, what causes seasons among the following options: - moon - decreased differentiation - earth's revolving - the ocean - Physical weathering - colors of the spectrum - gravity - dry conditions
(A).
earth's revolving

Ques:Landfills have a negative impact on the environment, and solid waste is stored in landfills. Given these facts, what has a negative impact on the environment among the following options: - cigarettes - animals - deforestation - rain - wind - Pesticides - Pollution - solid waste

Ans:solid waste

Ques:Wind is used for producing electricity, and winds are caused by pressure differences. Given these facts, differences in what are used to produce electricity? among the following options: - coded genes - hormones - waves - Temperature - engines - heat - energy usage - pressure

Ans:
pressure