Which of these statements best explains how adaptation provides evidence to the scientific theory of evolution? It proves that natural selection is the only means of evolution.

It shows that organisms choose to adapt to changing Earth conditions.

It proves that natural selection leads to greater complexity in organisms.

It shows that some features in an organism help it survive better on Earth.

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

Can someone me with 3 and 4 plz. this is for masteries test.

Identify arrows pointing to bonding electrons. done h-0-0-h ) intro