Which statement describes gravity? Select three options.
O There is no defined unit of measurement for gravity.
O Gravity is the force that pulls objects toward Earth's center.
O Objects that have a small mass will have no gravitational pull.
O Gravitational pull between two objects increases as the mass of one increases.
O Gravitational pull decreases when the distance between two objects increases.

The diagram below represents a marine food web and a process that can harm the human population. each circle represents an organism and the smaller dots inside them represent a toxic substance. what is being represented and how does it harm the population? the diagram represents biological half-life, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents biomagnification, in which toxins build up in organisms higher up on the food chain, and this can negatively impact humans who consume the organisms and the toxic substance. the diagram represents the process by which different organisms prey upon each other; this can impact the human population by reducing the number of organisms that do not contain the toxin. the diagram represents the way that toxins are metabolized by living organisms, with those at greater trophic levels able to metabolize more efficiently than those at lower levels. this means that those at higher tropic levels are safer for humans to consume compared to the organisms at lower trophic levels.

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment

In the respiration-photosynthesis cycle shown above, what are the products of cellular respiration that belong in box 2?