Which law best describes why the planets are pulled toward the sun and orbit it? newton's law of universal gravitation kepler's law of ellipses newton's 2nd law of motion newton's 3rd law of motion

The forces that attract the sun and the planet toward
each other are described almost exactly by Newton's
law of universal gravitation.

In order to derive the existence of orbits, you also need
Newton's second law of motion.

Once you have properly mashed and massaged these two
laws together on paper, you GET Kepler's law of ellipses,
plus Kepler's other two laws of planetary motion. 

It's really a beautiful math exercise and experience. 
The agreement is so perfect that it gives you, right there on
your paper, powerful powerful arguments for the correctness
and accuracy of both Kepler's laws AND Newton's laws.
(But not proofs.  They're all "only theories".)

Acetic acid  /əˈsiːtɪk/, systematically named  ethanoic acid  /ˌɛθəˈnoʊɪk/, is a colourless liquid  organic compound  with the  chemical formula  ch3cooh (also written as ch3co2h or c2h4o2). when undiluted, it is sometimes called  glacial acetic acid.  vinegar  is no less than 4% acetic acid by volume, making acetic acid the main component of vinegar apart from water. acetic acid has a distinctive sour taste and pungent smell. in addition to household vinegar, it is mainly produced as a precursor to  polyvinyl acetate  and  cellulose acetate. it is classified as a  weak acid  since it only partially  dissociates  in solution, but concentrated acetic acid is corrosive and can attack the skin.acetic acidnamespreferred iupac nameacetic acidsystematic iupac nameethanoic acidother namesvinegar (when dilute); hydrogen acetate; methanecarboxylic acid[1][2]identifierscas number64-19-7  3d model (jsmol)interactive image3dmetb00009 reference506007chebichebi: 15366  chemblchembl539  chemspider171  drugbankdb03166  echa infocard100.000.528ec number200-580-7e numbere260  (preservatives)gmelin reference1380iuphar/bps1058keggd00010  meshacetic+acidpubchem  cid176rtecs numberaf1225000uniiq40q9n063p  un number2789inchiinchi=1s/c2h4o2/c1-2(3)4/h1h3,(h,3,4)  key:   qtbsbxvteameqo-uhfffaoysa-n  smilescc(o)=o