While some archaeologists have suggested that the colossal moai of Rapa Nui were moved using wooden sleds made from palm trees, scholars have theorized more recently that the moai were carved from stone megaliths already on the site carved from stone megaliths already on the site A moved while standing upright with a system of ropes and levers moved while standing upright with a system of ropes and levers B dragged to their locations by domesticated animals and carts dragged to their locations by domesticated animals and carts C assembled in place using the ashlar masonry technique

sry i ned the points

Explanation:

mass production/ assembly line production

the underground railroad (apocope of the metropolitan railroad) is a system of urban trains located within a city and its metropolitan area. it is characterized for being a massive transport of passengers in the big cities, uniting diverse zones and their environs, with high capacity and frequency and in segregated form to other systems of transport. metropolitan railroads are built underground or on the surface, although most systems use mixed models where sections are combined in both modalities.

1 - as a result, the metro tends to reduce car travel for two reasons: first, due to the greater transfer of users from the car and, second, due to the reduction in the acquisition of cars in homes located in sectors near the stations of the metro.

2 -the metro allows to contribute effectively to the achievement of all the objectives of an urban development policy: it improves the efficiency of the city's economy by reducing travel costs and also generates a higher level of activities in the city center, taking advantage of of the agglomeration economies.

3 -it is a clean means of transport, since it uses renewable energy (usually electricity), taking care of the environment and avoiding excessive pollution.