Agree that Nemesis ever existed, it broke Tree or the solar system early in the suns nistory, long perore tnere was te on eart, and thus could not nave ngurea in any extinctions. (11) Neither of two large-scale studies using highly sensitive instruments-2MASS and NASA's WISE-have detected anything that could be Nemesis
The writer is working on a new version of the passage and wants to include an explicit statement of the passage's thesis.
Which of the following would best serve as a thesis statement for the passage?
?
A
Recent research has revealed that Nemesis, a twin star to our Sun, has the ability to create astronomical events that affect the planets in our solar system
o
B)
It is unlikely that scientists will ever be able to identify why major extinction events seem to occur every 26 million years.
с
While the theory was initially promising, the existence of Nemesis (a supposed companion star to the Sun) and its effect on extinction events on Earth, is highly
doubtful.
D
Advances in technology greatly assist scientists in their work to prove the validity of theories posited by earlier researchers
E
Debris disks are always affected by companion stars, so researchers should focus on identifying the companion star linked to the Oort cloud in order to further
research on why extinction events occur every 26 million years.

3one of the biggest impacts a building has on earth is the energy it uses. currently, most of the world’s energy comes from burning fossil fuels. these fuels are dirty and when they are burned they pollute the air and water. one way to burn fewer fossil fuels is to reduce the amount of electricity a building has to use. passive solar heating, which uses heat from the sun, reduces the amount of fossil fuel used to heat buildings. passive solar heating requires a south-facing wall made of glass. when sunlight shines through the wall, it is collected and used to warm the building. another way green buildings reduce their electricity use is to install other energy sources. for example, some green buildings use panels that turn energy from the sun into useable electricity. which is the best summary of paragraph 3? a) fossil fuels are dirty and pollute the air and water. most of the world's energy comes from these fuels. b) the biggest problem of buildings is that they use fuel that is dirty for heating. they need to do something to be more energy efficient. c) panels that turn energy from the sun into electricity and passive solar heating can stop the burning of fossil fuels which pollute air and water. d) since fossil fuels are dirty and pollute the air and water, other technologies that pollute less and produce energy have been developed like solar energy and green buildings.