Please capitalize where necessary: during most of its existence it concentrated on animal feeds, poultry, and seeds.
A: During most of its existence it concentrated on animal feeds, poultry, and seeds.

Q: origami paper - origami diagrams - basic shapes (bird)

A: Origami Paper - Origami Diagrams - Basic shapes (Bird)

Q: the work on mars was essentially completed by 1605, but there were delays in getting the book published.
A: The work on Mars was essentially completed by 1605, but there were delays in getting the book published.

Problem: games also include all kinds of games associated somehow with the underwater world and mermaids.
Can you repeat this sentence, but capitalize it?
Answer: Games also include all kinds of games associated somehow with the underwater world and mermaids.

Text: because of an in vitro study, dha is suspected of being a genotoxic substance with mutagenic properties.

Correct capitalization: Because of an in vitro study, DHA is suspected of being a genotoxic substance with mutagenic properties.

Problem: 3 ye have compassed this mountain long enough: turn you northward.
Can you repeat this sentence, but capitalize it?
Answer:
3 Ye have compassed this mountain long enough: turn you northward.