Snail poison is non biodegradable in nature. As a result, when we move up trophic levels in any food chain, this snail poison gets accumulated progressively and increases in quantity. This is known as biological magnification. It is due to this phenomenon that the owl has more poison than each snail.
Sublimation is conversion of solid of vapors on heating and vapors to solid on cooling. The solid which undergoes sublimation is called sublime, whereas the solid obtained by cooling vapors is called sublimate.