Foreigners, or Aliens.
It has opposite circular parallel sides with a rounded body
Every quadrilateral has opposite sides, but I'm assuming you probably are asking about a trapezoid.
a linear pair!
A square
A trapezoid is a 4 sided quadrilateral with 1 pair of opposite parallel sides of different lengths
C. Both pairs of opposite sides are congruent and parallel.
The question describes a square. So it's a square, bub!
A square or a rhombus will fit the given description
paramid
They are the sides facing each other at opposite sides.
rectangle
Opposite sides are parallel.Opposite sides are congruent.Opposite angles are congruent.