Which is considered the most widely used group of antibiotics due to their bactericidal nature, their resistance to beta-lactamases, and their activity against a broad spectrum of pathogens?

The beta-lactam group of antibiotics such as penicillins (i.e. Amoxicillin), cephalosporins (i.e. Cefuroxime), and carbapenems (i.e. Meropenem) is the most widely used group of antibiotics. Beta-lactams are bactericidal. Beta-lactams have no innate resistance to beta-lactamases (enzymes produced by bacteria to break down beta-lactam antibiotics), but they can be paired with a beta-lacamase inhibitor such as Clavulanic acid. Later generations of beta-lactams may offer resistance to beta-lactamases. Beta-lactams offer activity against a broad spectrum of bacterial pathogens, including gram-positive, gram-negative, and (in higher doses, such as Cefazolin) anaerobic coverage. 

A: rachel carson :

No because the eaeht is on a 23.5 degree axis tilt and so when it is winter the northern hemisphere is pointing away from the sun and the soutubern hemisphere is pointing toward the sun