The past tense of cost is usually “cost”.
Very rarely is the past tense “costed” used, it’s more common to just say cost.
The growing amount has caused the native species in the area to shrink, and is threatening the endangered species, due to the fact that it eats anything and everything it can catch. it also competes with the alligators, which are a key part of the ecosystem
I'll just rewrite the sentence how it's supposed to sound...
My bike tire was low, i wasn't surprised that it went flat just as it began to rain.
