Chinese reading composition "The world of ants is free from traffic jams" Help me!

1, "the former" refers to "ants returning to their nests from a crowded narrow path" and "the latter" refers to "another oncoming companion"

2. "First choice" means "first choice, first consideration"

"This seemingly uncomplicated little gesture" refers to "pushing" each other with your body.

In one experiment, the researchers first placed some foods that ants like to eat near the nest, and then established two channels, one wide and one narrow, between the nest and the food. In another experiment, researchers set up many criss-crossing channels between food and ant nests.

Now people use advanced communication technology, so that all vehicles can know the traffic conditions of the surrounding roads in time and choose the appropriate walking route. In this way, the phenomenon of traffic congestion has been greatly alleviated.