Who designed the first periodic table?
a. john dalton
b. louis pasteur
c. gregor mendel
d. dmitri mendeleev

Dmitri Mendeleev

Explanation:

Mendeleev published his periodic table of all known elements and predicted several new elements to complete the table in a Russian-language journal. Only a few months after, Meyer published a virtually identical table in a German-language journal.[45][46] Mendeleev has the distinction of accurately predicting the qualities of what he called ekasilicon, ekaaluminium and ekaboron (germanium, gallium and scandium, respectively). (wiki.com)

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.