The diagram below shows an energy pyramid.

which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid?
a.
the animals at each level use energy, so only a small amount of their energy is available to the next level.
b.
the animals at higher levels move more than animals at lower levels, so they require more energy.
c.
the animals at each level have more predators, so they produce more offspring.
d.

The movement of tectonic plates in two different locations is shown below: two blocks labeled location a and location b are shown. at location a the top layer of the block shows two horizontal arrows pointing towards each other. small dunes are shown in the middle between the two arrows. the block labeled b has a vertical line in the middle. on the left of the line there is an arrow pointing down. on the right of the vertical line there is an arrow pointing up which statement is most likely true? subduction may occur in both locations. earthquakes may occur in both locations. subduction may occur in location a only and a volcanic eruption may occur in location b only. an earthquake may occur in location a only and a volcanic eruption may occur in location b only.

The body is protected against harmful flu viruses by

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit