The correct answer is option B, that is, Ciliophora.
Ciliophora is the term used for the phylum usually known as the ciliates. Ciliates are the most complex of cells, exhibiting an elaborate cytoskeleton, cilia, two distinct types of nuclei. Ciliates are single-celled species, which at a certain phase of their life cycle, possesses cilia, that is, short hair-like projections used for food gathering and locomotion.
Weather is the current state of the atmosphere and is determined by factors like temperature, pressure and humidity wind
In order to study winds you have to study the atmosphere
Answer:
materials move against a concentration gradient