The breeding of animals is necessary to produce (4) . Humans have bred animals and plants for
years through the process of (5) in order to
hand-select traits needed in the livestock or produce.
In nature, it is not quite so simple. Charles Darwin was
a naturalist that proposed the idea of (6). When
visiting the Galapagos islands, he discovered there was
great (7) between the tortoises on different
islands. The different tortoises had had specific
(8) to survive on the islands that
they were found on.

Fill in the blanks
There is no more information this is all they gave me

i wish i could with all of them i can barley see the first one so here's the answer to the first one b

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.