You are presented with the question "Harm to the ecosystem can come from" and the following answer choices: - pesticides - fossil fuels - global warming - cell mutations - mechanical weathering - flooding - vehicles - under population Now knowing that pesticides can cause pollution and air pollution harms the ecosystem, choose the best answer.
pesticides
(Question)
You are presented with the question "What does sharpening a knife do?" and the following answer choices: - change its material - make it stay the same - lowered energy cost - duplicate itself - Relieve pain - change its shape - change its color - It gets heated up Now knowing that sharpening an object causes that object to change shape and very often their only metal object in the house is a cooking pot or a knife, choose the best answer.
(Answer)
change its shape
Ques: You are presented with the question "What is common in the southwestern portion of the subsection?" and the following answer choices: - permineralization - deuterostomes - barrel-shaped - cactuses - swamp vegetation - peachleaf willow - precipitation - gene flow Now knowing that sinkholes are formed by precipitation and sinkholes are common in the southwestern portion of the subsection, choose the best answer.
Ans: precipitation
(Q).
You are presented with the question "Cutting down what has a negative impact on living communities?" and the following answer choices: - bushes - on calories - habitat - manmade structures - invasive species - disease - bamboo - trees Now knowing that cutting down trees has a negative impact on an ecosystem and ecosystems are living communities, choose the best answer.
(A).
trees
Ques:You are presented with the question "What has a circulatory system with one or two hearts that pump blood?" and the following answer choices: - squids - fur seals - the Sun - goats - the ocean - rocks - sharks - a fish Now knowing that mollusks have a circulatory system with one or two hearts that pump blood and interestingly, a squid is also a mollusk, choose the best answer.

Ans:squids
Ques:You are presented with the question "Water that is not what can have a negative impact on the body?" and the following answer choices: - salinity - chemicals - sweat - an object - tested - deadly - dangerous - dead Now knowing that disease-causing microbes have a negative impact on the body and water was tested for the presence of disease-causing microbes, choose the best answer.

Ans:
tested