Answer:
The best way to start an argumentative essay on the death penalty is to explain what the death penalty is.
Step-by-step explanation:
An argumentative essay should always begin with an introduction. The introduction is the part of the essay where the main theme is briefly explained, so readers of the essay will have a slight sense of what will be discussed in the development of the essay. In this case, the best way to start an argumentative essay on the death penalty is to write a brief explanation of what the death penalty is.