[Q]: How does the sentence end?

Tanya showed a lot of gratitude to Natalie because

[A]: Tanya really appreciated them lending some help.

[Q]: How does the sentence end?

I want to use the silk thread instead of the synthetic thread for this embroidery project because the

[A]: synthetic thread is low-quality.

[Q]: How does the sentence end?

Neil got a bird as a pet and Michael go a horse because

[A]:
Neil liked animals that could fly.