*Question*
Q: Some fish will be over-fished to the point that their species ceases to exist, which is also known as what? Read this paragraph and choose the correct option from the provided answers: will inevitably make it more difficult and costly to grow food. The world's growing human population faces significant challenges in the increasing costs and other difficulties associated with producing food. Wild Food Sources In addition to growing crops and raising food animals, humans obtain food resources from wild populations, primarily wild fish populations. For about one billion people, aquatic resources provide the main source of animal protein. But since 1990, production from global fisheries has declined. Despite considerable effort, few fisheries on Earth are managed sustainability. Fishery extinctions rarely lead to complete extinction of the harvested species, but rather to a radical restructuring of the marine ecosystem in which a dominant species is so over-harvested that it becomes a minor player, ecologically. In addition to humans losing the food source, these alterations affect many other species in ways that are difficult or impossible to predict. The collapse of fisheries has dramatic and long-lasting effects on local human populations that work in the fishery. In addition, the loss of an inexpensive protein source to populations that cannot afford to replace it will increase the cost of living and limit societies in other ways. In general, the fish taken from fisheries have shifted to smaller species and the larger species are overfished. The ultimate outcome could clearly be the loss of aquatic systems as food sources. Choices: - endangered - accumulation - abundance - extinction A:
**Answer**
extinction

*Question*
Q: How is most evidence gathered in science? Read this paragraph and choose the correct option from the provided answers: Lab experiments are the main method of gathering evidence in some branches of science. Why might lab experiments not be the best way to study living things, such as wild animals?. Choices: - hypothesis - observation - field research - lab experiments A:
**Answer**
lab experiments

*Question*
Q: What forms when the metal sodium gives up an electron to the nonmetal chlorine? Read this paragraph and choose the correct option from the provided answers: An ionic bond forms when the metal sodium gives up an electron to the nonmetal chlorine. Choices: - covalent bond - van der waals force - hydrogen bond - an ionic bond A:
**Answer**
an ionic bond

*Question*
Q: What do we call the most widely accepted cosmological explanation of how the universe formed? Read this paragraph and choose the correct option from the provided answers: There is a great deal of evidence that the Universe started with a big bang. The Big Bang theory is the most widely accepted cosmological explanation of how the Universe formed. Think about the expanding Universe, then reverse it. If we start at the present and go back into the past, the Universe gets smaller. What is the end result of a contracting Universe? A point. Choices: - big crunch theory - singularity theory - big light theory - big bang theory A:
**Answer**
big bang theory