threaded or threadable tubes, seamless, of iron or non-alloy steel (excl. cast iron products and products plated or coated with zinc)

How would the previous sentence be correctly capitalized?
Answer: Threaded or threadable tubes, seamless, of iron or non-alloy steel (excl. cast iron products and products plated or coated with zinc)
it is because of the solar energy that there is life on earth. without the heat from the sun, the earth would be a cold place and it is solar energy that drives photosynthesis.

How would the previous sentence be correctly capitalized?
Answer: It is because of the solar energy that there is life on Earth. Without the heat from the sun, the earth would be a cold place and it is solar energy that drives photosynthesis.
all i had done until then, what i thought, the things i believed in seem absurd hit, without sense.

How would the previous sentence be correctly capitalized?
Answer: All I had done until then, What I thought, the things I believed in seem absurd hit, without sense.
all the experiences which the late be forgotten.

How would the previous sentence be correctly capitalized?
Answer: All the experiences which the late be forgotten.