Help i give brainilest Which is the function of the exoskeleton in animals? (2 points)

a. Produces the sperm used in reproduction
b. Protects against different weather
Protects against their environment's (this answer is incorrect so don't choose it stoopid)
d. Works with muscles to allow movement

The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.