NCERT Book Class 7 English (The Alien Hand) Chapter 1 The Tiny Teacher

Though so very small, the ant is unbelievably intelligent
and hard-working.
Among the various kinds, the commonest ant is black
or red.
Ants live in comfortable homes called ‘anthills’.

NAME the smallest insect you have seen, and the wisest. Is
it the fly? No, it isn’t. Is it the mosquito? No, not the
mosquito. Then it must be the worm. No, none of these. It
is the ant —the commonest, the smallest but the wisest
insect. The story of an ant’s life sounds almost untrue. But
people have kept ants as pets, and have watched their daily
behaviour closely. So we know a number of facts about
this tiny, hard-working and intelligent creature.
An ant uses its feelers or antennae to ‘talk’ to other
ants by passing messages through them. Watch a row of
ants moving up or down the wall. Each ant greets all the
others coming from the opposite direction by touching
their feelers.