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: [[Natural Selection]] causes [[Evolution by Natural Selection|evolution]] of [[species]].
: [[Natural Selection]] can happen due to the physical environment making some variations more likely to survive than others or due to other [[organism]]s in the [[Food Chain|food chain]].
==Key Stage 4==
===Meaning===
[[Natural Selection]] is a process in which the conditions in an [[ecosystem]] favour the survival and [[reproduction]] of individuals with particular characteristics and is known to be the cause of [[Evolution by Natural Selection|evolution]].
===About Natural Selection===
[[Natural Selection]] is caused by three factors:
#There is [[variation]] within a [[species]].
#[[Variation]]s can be passed down from parent to [[offspring]].
#[[Population]]s always produce more [[offspring]] than the environment can support which causes [[Competition (Biology)|competition]].