Ancient astronomers thought that earth was flat. which observation eventually proved that this is wrong? a) earth is at the center of the solar system. b) the moon and the sun are spherical in shape. c) there are days and nights and seasons on earth. d) earth’s shadow on the moon shows it is spherical.

D) Earth's shadow on the moon shows it is spherical.

Explanation:

According to ancient astronomers, Earth was flat. But it was eventually proved wrong.

1. Had Earth been flat, ship in the sea could be seen for a far distance but it is not so.

2. During the lunar eclipse, the shadow of the Earth falling on moon would have been flat or would have sharp edges. But, the shadow was found to be round in shape. A spherical object casts a round shadow.

Thus, option D is correct.

it's c. (to reduce the greenhouse effect/carbon gasses)

i'm guessing this is from edg enuity so the answers would be, from top to bottom,

theodor schwann

matthias schleiden

robert hooke

rudolph virchow

anton van leeuwenhoek