Flares and filament activation in active regions on the Sun

The present paper considers different types of the filament activation on the Sun, the relation between flares and coronal mass ejections, and also the role of the magnetic field topology and motions in photospheric layers. Observations at the Coudé refractor «Opton» with the Hα filter at the Sternberg State Astronomical Institute high-mountain expedition and data from scientific publications are used.