True , because gravity is a force of nature. Matter (energy) does attract other matter
Velocity is the speed at which an object is moving, and the direction
in which it's moving.
Acceleration is the rate at which the object's velocity is changing, and
the direction in which it's changing.
A compound contains two or more different elements.
It also contains two or more atoms.
Both answers work
The answer is a)phytoplankton because the krill needs to eat the phytoplankton and the seal needs to eat the krill and so on