Cyclical variability of prominences, CMEs and flares

Solar flares, prominences and CMEs are well known manifestations of solar a ctivity. For many years, qualitative studies were made about the cyclical b ehaviour of such phenomena. Nowadays, more quantitative studies have been u ndertaken with the aim to understand the solar cycle dependence of such phe nomena as well as peculiar behaviour, such as asymmetries and periodicities , occurring within the solar cycle. Here, we plan to review the more recent research concerning all these topics.