Can anyone give me feedback It's about how finches beak depth and length relate to genetic adaptations

Also sorry for any grammar or punctuation mistakes I have fixed those on the document but I voice types here

there is genetic variation in the finches beaks because when there is Iranian environment the finches with smaller beaks can survive because they are more tiny seeds. this is also why in a dry environment finches with larger beaks Will survive more because they can crack open the bigger seeds. finches have a different variety of beak sizes. when there is a drought the bigger seeds could survive with less rain. but when there was a lot of rain finches with the adaptation of smaller beaks survived because the rainfall had produced Vines that covered the bigger seeds but produced a lot of smaller seeds. the finches with the bigger beaks could not get to the smaller seeds and had a very hard time finding any of the bigger seeds. this is why depending on what genetic adaptation the finch has it will have a better chance of surviving and reproducing. a genetic variation of beak depth and length have allowed some of the finches in different environments to survive and thrive, while other finches numbers have gone down.