D. They are heterotrophs that digest food internally.
Answer:
Space radiation is made up of three kinds of radiation: particles trapped in the Earth's magnetic field; particles shot into space during solar flares (solar particle events); and galactic cosmic rays, which are high-energy protons and heavy ions from outside our solar system.
Explanation:
The relationship between the speed, the frequency and the wavelength of a wave is given by:

where
f is the frequency
v is the speed of the wave

is its wavelength
for the pressure wave in this problem,

and v=1400 m/s, therefore its frequency is
Answer:
There are 4 forces because a parallelogram has 4 sides.
It is a quadilateral. Let me know if I am right or not.
Answer:
C
Explanation:
Earthquake s are subducting the ancient early rocks