In the oceans the colder water sinks into deep basins, while warmer water stays closer to the surface. the water then moves around the ocean basin. this causes

a) tidal waves.
b) wind drifts.
c) ocean currents.
d) plate tectonics.

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

d. planting trees

the trees take in carbon to make oxygen.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )