In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

In a Gustave Caillebotte painting named for one of these objects, a dog walks by a man who holds his
head in his hands. Silvano Vinceti claimed that the numbers two and seven were hidden in one of these
objects in the background of the Mona Lisa. The title fireworks show of James Whistler's Nocturne in
Black and Gold takes place over one of these objects. One of these objects named "Maidenhead" is thought
to have inspired the one J.M.W. Turner painted in Rain, Steam and Speed. A Japanese inspired structure of
this type at Giverny was often painted alongside water lilies by Claude Monet. For 10 points, name these
structures which Canaletto often painted crossing the canals of Venice.
Fine Arts

This quantity can be defined as minus the temperature times the derivative of entropy with respect to particle number. The Gibbs factor is a generalization of the Boltzmann factor that takes this quantity into account. Usually defined as the derivative of the Helmholtz free energy with respect to particle number, FTP name this quantity which governs particle flow, as particles flow from systems with higher values to systems with lower values.
Science

Most proteins, such as Gelsolin, interact with this by binding in the hydrophobic cleft between its subdomains 1 and 3. That cleft can also bind subdomain 2 of a different molecule of this protein, a nucleation reaction mediated by the Arp 2/3 complex. Although it can be visualized with fluorescently tagged phalloidin, that treatment increases the amount of this protein at the cell membrane, where its normal functions include promoting cell adhesion by linking to cadherin via vinculin and catenins. Thymosin beta 4 maintains the cellular concentration of its free form, while profilin catalyzes its exchange of ADP for ATP and thus promotes its polymerization. Once polymerized, it can form dynamic structures such as lamellipodia and the contractile ring during cytokinesis. ATP hydrolysis causes globular monomers to be released from its filamentous form., and troponin regulates its binding of motor proteins in sarcomeres. For 10 points, name this cytoskeletal protein that forms microfilaments and is associated with myosin in muscle cells.
Science