arriving at a house, which, if we might judge in the darkness, seemed to be of rather greater pretensions than its fellows, our guide stopped, and whispered to us to mount some steps to a raised wooden gallery, which intervened between the lane and the doorway. on this, besides the door, a couple of unglazed windows looked out. the shutter of one was ajar, and showed us a large, bare room, lighted by a couple of rushlights. directing us to place ourselves close to this shutter, the innkeeper knocked at the door in a peculiar fashion, and almost immediately entered, going at once into the lighted room. peering cautiously through the window we were surprised to find that the only person within, save the newcomer, was a young woman, who, crouching over a smoldering fire, was crooning a lullaby while she attended to a large black pot.
which word best describes the tone of the excerpt?

a.
mysterious
b.
mocking
c.
frustrated
d.
troubled

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.

Number and variety of living organisms includes genetic, species, and ecological types

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?