you are using the oh so common ill-conceived pro creation view of evolution - you seem to think that life evolved through choice. NO ONE claims that things chose to evolve to changing conditions around them - the theory states that RANDOM changes would sometimes improve a species making it more suited to its surroundings, therefore it would survive and others would die - the creatures with those good features would breed and make more like that, they would thrive and multiply - but we're talking about changes on a scale of millions upon millions of years! do you have any conception of how long that is?! very.
i'm not a scientist, but i can still grasp that the concept of evolution, and I feel it is a highly logical explanation. for instance, say there are two kinds of rabbit right, a white one and a brown one - and they live in a place called Fantasia - Fantasia was once green and temperate, and the brown rabbits thrived and multiplied like....rabbits. hehe, then one day a freak rabbit was born with all white fur. the population of this white rabbit grew, but it was always in more danger than its brown brethren since it could be spotted so easily by predators - then over several years, Fantasia turned into a snowy area, and the ground was white most of the year round - at this time the white rabbit, previously a genetic freak, instantly gained superiority in the battle for survival, and it became the dominant species in numbers.
you see how a RANDOM change like that can affect what life lingers on earth and what life gets wiped out? that's what evolution is all about - not some fish thinking - i'll grow legs and walk out of the water - that is such gross simplification and frankly it's just childish. there's way more evidence for evolution than creation, and it makes far much more sense.
i never understood why we tell kids about how all the make believe stuff in the world is all nonsense and we all have to grow out of it some day, but then also turn to them and say a big magic man in the sky made everything you see around us, only 6000 years ago, and adam and eve lived in the garden of eden when the serpent talked to eve and blah blah - that is told to be gospel truth! it's such hypocrisy.
evolution is not perfect, that's why we still refer to it as the THEORY - but in my opinion it is so far the most logical explanation for how life on earth developed. evolution doesn't answer the question of whether or not there is a god, but I do believe it answers the question to how we came to be as we are, and perhaps what we might become in the future!