Explanation

• A population is a localized group of organisms that belong to the same species and live in a specific geographic area.
• It is a unit of evolution, and its members share a common gene pool.

Explanation

Vitamin B deficiency can cause diseases such as:

• beriberi
• pellagra 
• anemia

Vitamin B12 deficiency anemia happens when your body does not have enough healthy red blood cells

Explanation

• Deforestation is the permanent destruction of forests to make the land available for other uses.
• Such as agriculture, urbanization, and logging.

Explanation

• Giant pandas are an endangered species, due to habitat loss, low birth rates, and other factors.
• Conservation efforts are in place to protect this iconic species.

Explanation

• The poisonous gas which is the main byproduct of motor vehicles with an irritating smell is sulfur dioxide (SO₂).
• Sulfur dioxide is produced by the combustion of fossil fuels containing sulfur and contributes to air pollution and respiratory problems.

Explanation

Carbon monoxide (CO) is a colorless, odorless, and highly toxic gas that is emitted by the incomplete combustion of fossil fuels, such as gasoline, natural gas, and wood.

Explanation

• Global warming is the gradual increase in Earth's surface temperature, primarily caused by human activities releasing greenhouse gases. 
• It leads to rising temperatures, extreme weather events, and altered ecosystems.

Explanation

• Carbon dioxide (CO2) is produced when trees and fossil fuels are burned, through a process called combustion.
• Combustion releases carbon dioxide and water vapor into the atmosphere.

Explanation

• Acid rain affects the photosynthesis and growth of plants.
• Acid rain can alter soil chemistry and damage leaves, which in turn negatively impacts the photosynthesis process and overall plant health.

Explanation

• Air pollution is actually considered the most dangerous type of pollution.
• According to the World Health Organization (WHO), air pollution is responsible for an estimated 7 million premature deaths worldwide each year, mainly due to heart disease, stroke, and lung cancer.