10 POINTSPLEASE HELP ASAP WILL MARK BRAINLEST
Living things, including humans, play a role in many of the cycles that affect the Earth globally. Which of the following best describes how they contribute to these cycles?
A.
through death and decay only
B.
through daily activities, death and decay, and technology
C.
through daily activities, death and decay
D.
through daily activities only

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

What is the number of atoms in 3.54 mol s

What is the mass of 0.46 mil of mgcl2