Are mammals endothermic or ectothermic?

A. endothermic
B. ectothermic

Organum was first developed by religious singers adding another melody directly above the chant and mirroring the chant line. true false

In which quotes does the author use the word "chains" literally? in which quotes does she use the word figuratively?

(i think my answer is a, am i correct? ) a pentagonal traffic sign is a sign. a. school crossing b. parking c. wrong way d. yield