Natural And Human Environment

Explanation
Option 1 is a living thing because living things are characterized by certain features such as growth, reproduction, metabolism, and response to stimuli. Without any additional information about the options, it can be assumed that Option 1 possesses these characteristics and is therefore a living thing.

Explanation
Option 3 is a non-living thing because it is stated directly in the question that it is the correct answer.

Explanation
A teacher is a living thing because it is a human being who can grow, reproduce, and respond to stimuli. Unlike mountains and the sun, which are non-living entities, a teacher has the characteristics of life such as the ability to breathe, eat, and move. Teachers are also capable of learning, teaching, and interacting with their environment and other living organisms.

Explanation
Water is a non-living thing because it does not have the characteristics of living organisms. It does not grow, reproduce, or require energy to survive. Water is a chemical compound made up of hydrogen and oxygen molecules, and it exists in various forms such as liquid, solid (ice), and gas (vapor). It is essential for the survival of living organisms, but it is not considered a living thing itself.

Explanation
The given question asks for a human-made item among the given options. Option 3, the ball is human-made. 

Explanation
Living things, including plants and animals, require food, water, and air to survive. These essential elements provide the necessary nutrients, hydration, and oxygen for their metabolic processes, growth, and overall functioning. Non-living things, on the other hand, do not possess the characteristics of life and do not require these elements for their existence. Therefore, the correct answer is "Living things."

Explanation
Non-living things refer to objects or entities that do not possess the characteristics of life, such as growth, reproduction, metabolism, and response to stimuli. They do not have cells, organs, or the ability to breathe. Examples of non-living things include rocks, water, books, and computers. On the other hand, living things are organisms that have the ability to grow, reproduce, and respond to their environment. They are made up of cells and require energy to carry out life processes. Therefore, the correct answer is "Non-living things" as they are distinct from living things.

Explanation
The correct answer is Human Environment because it refers to the area where human beings live, including structures such as houses, roads, railways, parks, and shops. This encompasses the built environment created by humans for their habitation and activities.

Explanation
Pollution refers to the process of dirtying the environment by adding harmful substances to it. This can include the release of pollutants into the air, water, or soil, which can have detrimental effects on human health, wildlife, and ecosystems. Pollution can be caused by various human activities such as industrial processes, transportation, and improper waste disposal. It is a major global concern and efforts are being made to reduce pollution and promote sustainable practices to protect the environment.