HELP!!

Which statement best describes the greenhouse effect?

A. It is a process by which plants are able to grow well in a warm, enclosed structure.
B. It is a process by which greenhouse gases block the sun’s light to penetrate the atmosphere.
C. It is a process by which greenhouse gases allow the sun’s light to penetrate the atmosphere but stop the heat from escaping.
D. It is a process by which prevailing winds bring moisture to the land, to the prevailing wind direction.

Birds, bats and humans all have a vertebral column. a) if you group birds, bats and humans in one clade and leave out other apes and mammals, what type of group would they form (monophyletic, paraphyletic, polyphyletic)? explain b) what do we call a trait like presence of vertebral column within bats, birds and humans (synapomorphy (shared derived trait), symplesiomorphy (shared ancestral trait), homoplasy)? explain. c) what other organisms would you have to include in this clade in order to have a monophyletic group?