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We present a study on the star formation histories (SFHs) of galaxiescovering the range $10^{4}$ < M$_{\star}$/M$_{\odot}$ < $10^{12}$, leveragingfull spectral fitting algorithms. Our sample consists of 31 dwarf galaxies fromthe SAMI-Fornax Survey with stellar masses between $10^{7}$-$10^{9.5}M_{\odot}$, early-type galaxies from the ATLAS$^{3D}$ project with stellarmasses between $10^{10}$-$10^{12} M_{\odot}$, and dwarf galaxies that aresatellites of Andromeda and the Milky Way, with $10^{4}$ <M$_{\star}$/M$_{\odot}$ < $10^{8}$. We find that galaxies from $10^{7}$-$10^{8}M_{\odot}$ exhibit the smallest star formation rates (SFRs), while the SFRincrease as we move down or up in mass. In this sense, we find that some$10^{5} M_{\odot}$ galaxies have cumulative SFHs that are comparable to thoseof $10^{12} M_{\odot}$ galaxies. Our study shows that the evolution of giantgalaxies is primarily governed by their internal properties, with timescalesthat do not depend on their environmental location. In contrast, dwarf galaxiesbelow $10^{8} M_{\odot}$ can be significantly affected in dense environments,such as the inner regions of a cluster, that severely quench the galaxiesbefore the assembly of their 50% present-day mass. We find that, only dwarfswith stellar masses between $10^{7}$-$10^{9} M_{\odot}$ actively form starsnowadays, while less massive galaxies seem to remain unaffected by theenvironment due to the expulsion of most of their gas at an early stage intheir evolution. Our study highlights and corroborates a critical thresholdaround $10^{8}-10^{9} M_{\odot}$ in galaxy evolution from previous studies,separating more massive galaxies minimally impacted by the environment fromthose less massive galaxies quenched by it.

The SAMI -- Fornax Dwarfs Survey IV. Star Formation Histories of Dwarf and Early-Type Galaxies: Insights from Full Spectral Fitting