1define system, give one example of system and mention its 3 comonents 2-give one example of negative feedback
3-give one example of positive feedback
4-explain 4 spheres in earth

i need an image of the diagram

the answer is sex-linked recessive.

i think the answer is c hope this

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.