Install libsaga by entering the following commands in the terminal:
sudo apt update sudo apt install libsaga
SAGA GIS shared libraries - transitional package
SAGA GIS (System for Automated Geoscientific Analyses) is a geographic information system used for editing and analysing spatial data. . This package is a transitional package from libsaga to libsaga-api-2.3.1 and libsaga-gdi-2.3.1. It can safely be removed.