Which of the following is an example of an asset?

A liability is money or value the business must pay to others.

Option A: Money the business owes to suppliers is accounts payable, a liability.

Option B: Equipment the business owes to customers does not make sense; equipment is typically an asset owned by the business.

Option C: Money owed to customers could be a liability (e.g., advances), but A is the standard example.

Option D: Taxes owed is a liability, but A is highlighted.

$$\boxed{\textbf{A}}$$

Equity is the owner's residual interest in the assets after deducting liabilities (from accounting equation: Assets = Liabilities + Equity).

Options A and B are liabilities.

Options C and D refer to revenue, which increases equity (via profit), but the closest example of equity contribution is earnings/revenue leading to retained earnings.

$$\boxed{\textbf{C}}$$

Equity = Assets - Liabilities, representing net investment by owners after settling debts.

Option A matches this definition.

Option B is incorrect (owes implies liability).

Options C and D describe assets.

$$\boxed{\textbf{A}}$$