I was surprised by his wild behavior.

He took my hand.

I took a picture of the flowers in the park.

He likes catching bugs in the garden.

The children walked from house to house, shouting 'trick or treat'.

When an object is in free fall, its terminal velocity is determined by the balance between gravity and air resistance.

He should keep his promise.

Arthropods are a large group of animals that include insects, spiders, and shrimp.

The associative law is one of the basic laws of mathematics.

In mathematics, the commutative law applies to addition and multiplication.