input question: Fix spacing: Terrestrialecosystemshavechangedinthepast,arechangingnow,andwillchangeinthefuture.

output answer: Terrestrial ecosystems have changed in the past, are changing now, and will change in the future.

input question: Fix spacing: IhavechangedallthatwouldaffectthechangeIthink.

output answer: I have changed all that would affect the change I think.

input question: Fix spacing: Securefacingsinthedividingseamsofthetopsectionwithafewstitches.

output answer: Secure facings in the dividing seams of the top section with a few stitches.

input question: Fix spacing: 15SoIturnedandcamedownfromthemount,andthemountburnedwithfire:andthetwotablesofthecovenantwereinmytwohands.

output answer:
15 So I turned and came down from the mount, and the mount burned with fire: and the two tables of the covenant were in my two hands.