Explanation

Greenhouses are structures designed to provide an optimal environment for plants, particularly during colder seasons.

They trap sunlight, creating a warmer, more stable temperature that promotes plant growth in winter or colder climates.

Explanation

The ozone layer is located in the stratosphere, about 10 to 30 miles above Earth's surface.

It protects the Earth by absorbing most of the Sun's harmful ultraviolet (UV) radiation.

Explanation

Materials like cadmium and mercury are harmful and can cause serious health issues, so they are called toxic substances.

Toxic means poisonous or dangerous to living organisms.

Explanation

Condensation is the process where water vapor in clouds cools down as it moves through colder regions, turning into liquid water (rain) or solid ice (snow).

This process is a key part of the water cycle.

Explanation

Sea caves are formed when sea waves erode the base of a cliff, creating deep depressions in the rock.

These caves are typically shaped by the continuous action of water eroding the rock over time.

Explanation

بنیادی طور پر شہری اور صنعتی علاقوں میں ہوائی آلودگی زیادہ ہوتی ہے کیونکہ ان علاقوں میں گاڑیوں، فیکٹریوں اور دیگر صنعتی سرگرمیوں سے زہریلے گیسوں کا اخراج ہوتا ہے۔

یہ آلودگی فضا میں موجود ہوتی ہے اور انسانوں اور ماحول کے لیے نقصان دہ ثابت ہو سکتی ہے۔

Explanation

Explanation

The Exosphere is the outermost layer of Earth's atmosphere.

It extends from about 500 km to 10,000 km above Earth.

This layer gradually transitions into space and contains very few air molecules.

Explanation

Cumulus clouds are fluffy, white clouds with a deep color at the base and are found near the Earth's surface.

They usually indicate fair weather but can develop into storm clouds (cumulonimbus).

Explanation

Decomposition is slow in deserts due to low moisture and extreme temperatures.

Lack of water limits microbial activity, reducing the breakdown of organic matter.