Robert Boyle and Robert Hooke worked together and discovered some important physics concepts. Their work lead to the formation of Boyle's law; this describes the .

Answer:

the correct answer is 4 (giveaways to the public)

explanation:

something that is given away or gave out for free. an occasion at which things are given away to free. something that is evident or obvious; something that uncovers a mystery.

it could be be in a form of a lucky draw as well. these the company events gather more audience for their pr and it also increases their ratings as well. this is a way to attract more customers towards themselves.

Your answer is  d.)relationship between pressure and air volume and led to the understanding of how respiration works

Olfactory epithelium i believe

The answer is d because , safety almost always works, to prevent stds and pregnancy