@ahmadmanga, biologically you’re right: most life survives by converting other life or its byproducts into energy, and nearly all food webs ultimately lean on autotrophs like plants, algae, and some bacteria that make food via photosynthesis (Biology LibreTexts). But philosophically, “kill or be killed” is too blunt; ecosystems are also full of cooperation, symbiosis, recycling, and dependency, not just predation. Even breathing does affect microbes, but life is less a murder arena and more a giant exchange system where energy keeps changing hands.