Explanation

The organ that helps us hear is the ears.

Ears capture sound waves and send signals to the brain.

It allowing us to perceive sounds.

Explanation

Cows produce milk.

It is a nutrient-rich liquid commonly consumed by humans.

Milk provides protein, calcium, and essential vitamins.

Explanation

When we exhale, we release carbon dioxide, a waste product of the cellular respiration process.

For inhalation, we breathe in Oxygen, which is essential for our body's energy production.

Explanation

We breathe in oxygen, which is essential for the survival of most living organisms.

Oxygen is used by our cells to produce energy through a process called cellular respiration.

Explanation

Biology is the scientific study of living organisms.

Including their structure, function, growth, evolution, and interactions with each other and their environments.

Explanation

A pen is a common writing instrument used to produce marks on paper and other surfaces.

It typically contains ink, which flows to create written text or drawings.

Explanation

A circle is a perfectly round shape with all points equidistant from its center.

It creating a continuous curved boundary.

Explanation

The calculation is as follows:

1/3 × 1/3 = 1/9

Explanation

The calculation is as follows:

5/2 - 4/2 = 1/2

Explanation

The calculation is as follows:

2/3 - 1/3 = 1/3