There are three branches of government: the legislative (parliament), the judiciary (courts) and the executive (parliament). The constitution is the supreme law of the country, which contains principles that keep the branches of government from interfering with each other, as each branch is meant to function independently of the other.
The public can participate in some of the actions of these branches, but only up to a certain point. Firstly, of course, Namibian citizens have a constitutional right to vote in National Elections every five years, and therefore choose the members of the National Assembly. In this way, they are able to influence the composition of the legislature and the executive, as Cabinet members are traditionally chosen from the National Assembly.