A catalyst "provides an alternate reaction pathway with a lower activation energy". (2) is the correct answer.
Activation energy is the energy needed to conduct a chemical reaction. When a catalyst is put into the system, it makes the system require less activation energy, making the reaction go faster.
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When an animal eats some animal then it's energy get transferred in it's
body so, it helps in flow of the energy with in the ecosystem.
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<span>299,792,458 meters per <span>second</span></span>
1p is not possible because it goes like this 1s2 2s2 2p6