Which sentence states the central idea of the passage? You might be surprised to learn that robots have existed for hundreds
of years. Long before the development of modern electronics,
inventors were creating human- or animal-shaped robotic contraptions.
These robots used springs, levers, weights, and clockworks to do
simple tasks. Some of the most famous include a robotic knight
designed by Leonardo da Vinci in 1495 and an artificial duck from
1739 that could swim, flap its wings, and even eat and digest grain.
A. Robots have been around for a long time, but the advances made
in the 21st century are much more significant than those made
earlier
B. Leonardo da Vinci was a pioneer in robotics technology who
created a mechanical knight in 1495.

um is there supposed to be choices?

native american contribution: the patriots from britain learn how to hunt, fish, and introduce diversity within cultures.

african americans: indirectly introduced the idea of diversity to americans. africans coming to america because of slavery taught white americans that people come from different backgrounds and colors. it also built america's economic stability for a great period of time. 

women: make america what it is today. there are some societies that are in the world currently that do not give women the same right we give women here in the united states. because women have rights here in the united states, other countries' citizens strive to come to america, especially women, since they have equal rights in the united states. this is important because america is seen and desired by many in the world. 

children: children are our future. we learn from our elders and carry out things the same or differently learning from america's history. we continue tradition and change tradition if it is needed.