Explanation

Psychology focuses on the study of individual thoughts, emotions, and behaviors.

It helps in understanding how students learn, think, and act in educational settings.

Explanation

Sewage-contaminated water increases the biological oxygen demand (BOD), which depletes the dissolved oxygen levels in the water.

Fish and other aquatic animals rely on dissolved oxygen to breathe. When the oxygen levels drop significantly, it leads to suffocation and death of these organisms.

Explanation

Let's solve the equation x/2 - x/3 = 8.

To do this, find a common denominator for the fractions, which is 6.

This gives us (3x - 2x)/6 = 8, simplifying to x/6 = 8.

Multiplying both sides by 6 gives x = 48.

So, the solution is x = 48.

Explanation

یہ محاورہ اس بات کی طرف اشارہ کرتا ہے کہ طاقت ور شخص اپنے ارد گرد کے حالات یا لوگوں پر اپنی مرضی مسلط کرتا ہے۔

اس میں "لاٹھی" طاقت کی علامت ہے، اور "بھینس" اس طاقت کے استعمال یا اثرات کو ظاہر کرتی ہے۔

Explanation

The phrase means someone seems odd or chaotic but actually has a logical plan.

It's used to show that their unusual actions have purpose and direction.

Explanation

The tundra is a cold, treeless biome, characterized by permafrost and minimal vegetation.

It has low temperatures and short growing seasons, which limit the growth of trees.

Explanation

A runner is a specialized stem that grows horizontally along the ground and produces new plants at its nodes

Strawberries are known to reproduce through these runners. 

2. Mint plant:

While mint can spread quickly, it does so through suckers, not runners. S suckers grow vertically from the root system, whereas runners grow horizontally aboveground. 

3. Lachi:

There's no widely recognized plant called "lachi". This may be a typo or a less common term. 

Explanation

Cytoplasm is a thick, viscous liquid that fills the space between the nucleus and the cell membrane.

It holds and supports the cell’s organelles.

It is the site of many cellular processes.

Explanation

When the size of solute particles decreases, the solubility of a solid in a liquid increases because:

Surface Area Effect: Smaller particles have a larger surface area exposed to the solvent, speeding up dissolution.

Kinetic Energy: More collisions occur between solute and solvent molecules, enhancing solubility.

Explanation

Given:

Area = 42 cm² (assuming the unit is consistent, but it's given as m² which seems incorrect given the base lengths are in cm. Let's proceed with cm² for calculation purposes)

Bases:

a = 5.6 cm

b = 2.9 cm

Formula:

Area = ((a + b) / 2) × height

42 = ((5.6 + 2.9) / 2) × height

42 = (8.5 / 2) × height

42 = 4.25 × height

height = 42 / 4.25

height = 9.88 cm