What are the reactants

Reactants are initiators of a chemical reaction

Explanation:

In a chemical reaction, there are two types of substances involved: reactants and products.

The reactants are substances that are utilized to in a chemical reaction which undergo certain changes and thereby producing products at the end of a reaction

On can write chemical equation as :

A + B → AB

where A and B are reactants which underwent a reaction to produce the product AB.

For example

2 + → 2O

|______|        ↓

Reactants      Products

When writing a chemical equation, reactants are always written on left hand side of an arrow and the products on the right hand side.

it is very well related to a lot of things but with my limited knowledge i can confidently say that the answer is space.

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )