Wikipedia

No simple cause for sexual orientation has been conclusively demonstrated, and there is no scientific consensus as to whether the contributing factors are primarily biological or environmental.

The natural existence of homosexuality in non-human animals is considered controversial by conservative religious groups who oppose LGBT social movements because these findings seem to point to the natural occurrence of homosexuality in humans.

Advocates of intelligent design argue that it is a scientific theory, and seek to fundamentally redefine science to accept supernatural explanations. The unequivocal consensus in the scientific community is that [evolution by natural selection is true and that] intelligent design is not science.

...the discovery of more and more transitional fossils continues to add to knowledge of evolutionary transitions, making many of the "missing links" missing no more. ... Proponents of creationism have frequently made claims about the existence or implications of transitional fossils that some of the scientific community considers to be false and misleading. Some of these claims include: 'There are no transitional fossils.' ...[and]... 'No fossils are found with partially functional features.'

Modern geologists and geophysicists consider the age of the Earth to be around 4.54 billion years (4.54 × 109 years ± 1%). This age has been determined by radiometric age dating of meteorite material and is consistent with the ages of the oldest-known terrestrial and lunar samples.

The second law is only true of closed systems. It is easy to decrease entropy, with an energy source. For example, a refrigerator separates warm and cold air, but only when it is plugged in. Since all biology requires an external energy source, the Sun, there's nothing unusual (thermodynamically) with it growing more complex with time.