What does the prefix nano- in the word nanoparticles mean

Very small item

Explanation:

Nano- (symbol n) is a unit prefix meaning one billionth". Used primarily with the metric system, this prefix denotes a factor of 10−9 or 0.000000001.

a-he encouraged islamic schools to introduce greek texts.

d-he invited greek scholars to teach their texts to the locals.

explanation:

the transmission of the greek classics to latin western europe during the middle ages was a key factor in the development of intellectual life in western europe.[1] interest in greek texts and their availability was scarce in the latin west during the earlier middle ages, but as traffic to the east increased so did western scholarship.

mark brainliest and have a great day!

i guess the cause and effect would show how being around the smoke(the cause) can have negative effects on the body.

explanation: